Out-of-bounds read in .NET allows an unauthorized attacker to deny service over a network.
\n", "title": "microsoft - https://api.msrc.microsoft.com/cvrf/v3.0/cvrf/2026-Mar" }, { "category": "description", "text": "Out-of-bounds read in .NET allows an unauthorized attacker to deny service over a network.", "title": "nvd - https://nvd.nist.gov/vuln/detail/CVE-2026-26127" }, { "category": "description", "text": "# Microsoft Security Advisory CVE-2026-26127 – .NET Denial of Service Vulnerability\n\n## Executive summary\n\nMicrosoft is releasing this security advisory to provide information about a vulnerability in .NET 9.0 and .NET 10.0. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.\n\nA denial of service vulnerability exists in .NET and Microsoft.Bcl.Memory due to an out-of-bounds read when decoding malformed Base64Url input.\n\n## Announcement\n\nAnnouncement for this issue can be found at https://github.com/dotnet/announcements/issues/384\n\n## CVSS Details\n\n- **Version:** 3.1\n- **Score:** 7.5\n- **Vector:** `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C`\n- **Severity:** High\n- **Weakness:** CWE-129 (Improper Validation of Array Index); CWE-125 (Out-of-bounds Read)\n\n## Affected Platforms\n\n- **Platforms:** All\n- **Architectures:** All\n\n## Affected Products\n\n### .NET 9\nPackage name | Affected version | Patched version\n------------ | ---------------- | -------------------------\n[Microsoft.NetCore.App.Runtime.linux-arm](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-arm) | >= 9.0.0, <= 9.0.13 | 9.0.14\n[Microsoft.NetCore.App.Runtime.linux-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-arm64) | >= 9.0.0, <= 9.0.13 | 9.0.14\n[Microsoft.NetCore.App.Runtime.linux-musl-arm](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-musl-arm) | >= 9.0.0, <= 9.0.13 | 9.0.14\n[Microsoft.NetCore.App.Runtime.linux-musl-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-musl-arm64) | >= 9.0.0, <= 9.0.13 | 9.0.14\n[Microsoft.NetCore.App.Runtime.linux-musl-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-musl-x64) | >= 9.0.0, <= 9.0.13 | 9.0.14\n[Microsoft.NetCore.App.Runtime.linux-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-x64) | >= 9.0.0, <= 9.0.13 | 9.0.14\n[Microsoft.NetCore.App.Runtime.osx-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.osx-arm64) | >= 9.0.0, <= 9.0.13 | 9.0.14\n[Microsoft.NetCore.App.Runtime.osx-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.osx-x64) | >= 9.0.0, <= 9.0.13 | 9.0.14\n[Microsoft.NetCore.App.Runtime.win-arm](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-arm) | >= 9.0.0, <= 9.0.13 | 9.0.14\n[Microsoft.NetCore.App.Runtime.win-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-arm64) | >= 9.0.0, <= 9.0.13 | 9.0.14\n[Microsoft.NetCore.App.Runtime.win-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-x64) | >= 9.0.0, <= 9.0.13 | 9.0.14\n[Microsoft.NetCore.App.Runtime.win-x86](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-x86) | >= 9.0.0, <= 9.0.13 | 9.0.14\n\n### .NET 10\nPackage name | Affected version | Patched version\n------------ | ---------------- | -------------------------\n[Microsoft.NetCore.App.Runtime.linux-arm](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-arm) | >= 10.0.0, <= 10.0.3 | 10.0.4\n[Microsoft.NetCore.App.Runtime.linux-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-arm64) | >= 10.0.0, <= 10.0.3 | 10.0.4\n[Microsoft.NetCore.App.Runtime.linux-musl-arm](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-musl-arm) | >= 10.0.0, <= 10.0.3 | 10.0.4\n[Microsoft.NetCore.App.Runtime.linux-musl-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-musl-arm64) | >= 10.0.0, <= 10.0.3 | 10.0.4\n[Microsoft.NetCore.App.Runtime.linux-musl-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-musl-x64) | >= 10.0.0, <= 10.0.3 | 10.0.4\n[Microsoft.NetCore.App.Runtime.linux-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-x64) | >= 10.0.0, <= 10.0.3 | 10.0.4\n[Microsoft.NetCore.App.Runtime.osx-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.osx-arm64) | >= 10.0.0, <= 10.0.3 | 10.0.4\n[Microsoft.NetCore.App.Runtime.osx-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.osx-x64) | >= 10.0.0, <= 10.0.3 | 10.0.4\n[Microsoft.NetCore.App.Runtime.win-arm](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-arm) | >= 10.0.0, <= 10.0.3 | 10.0.4\n[Microsoft.NetCore.App.Runtime.win-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-arm64) | >= 10.0.0, <= 10.0.3 | 10.0.4\n[Microsoft.NetCore.App.Runtime.win-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-x64) | >= 10.0.0, <= 10.0.3 | 10.0.4\n[Microsoft.NetCore.App.Runtime.win-x86](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-x86) | >= 10.0.0, <= 10.0.3 | 10.0.4\n\n### Microsoft.Bcl.Memory 9.0.14\nPackage name | Affected version | Patched version\n------------ | ---------------- | -------------------------\n[Microsoft.Bcl.Memory](https://www.nuget.org/packages/Microsoft.Bcl.Memory) | >= 9.0.0, <= 9.0.13 | 9.0.14\n\n### Microsoft.Bcl.Memory 10.0.4\nPackage name | Affected version | Patched version\n------------ | ---------------- | -------------------------\n[Microsoft.Bcl.Memory](https://www.nuget.org/packages/Microsoft.Bcl.Memory) | >= 10.0.0, <= 10.0.3 | 10.0.4\n\n### How to fix the issue\n\nTo update the Microsoft.Bcl.Memory NuGet package, apply one of the following methods:\n\nNuGet Package Manager UI in Visual Studio:\n- Open the project in Visual Studio.\n- Right-click on the project in Solution Explorer and select \"Manage NuGet Packages...\" or navigate to \"Project > Manage NuGet Packages\".\n- In the NuGet Package Manager window, select the \"Updates\" tab. This tab lists packages with available updates from the configured package sources.\n- Select the package(s) to update. A specific version can be chosen from the dropdown, or the latest available version can be selected.\n- Click the \"Update\" button.\n\nUsing the NuGet Package Manager Console in Visual Studio:\n- Open the project in Visual Studio.\n- Navigate to \"Tools > NuGet Package Manager > Package Manager Console\".\n- To update a specific package to its latest version, run the following Update-Package command:\n\n```\nUpdate-Package -Id Microsoft.Bcl.Memory\n```\n\nUsing the .NET CLI (Command Line Interface):\n- Open a terminal or command prompt in the project's directory.\n- To update a specific package to its latest version, run the following command:\n\n```\ndotnet package update Microsoft.Bcl.Memory\n```\n\nOnce the NuGet package reference has been updated, the application must be recompiled and redeployed. Additionally, it is recommended to update the runtime and/or SDKs, but unless the application targets .NET 9 or higher, updating the runtime and/or SDK is not a required step to patch this vulnerability.\n\n## Other Information\n\n### Reporting Security Issues\n\nIf a potential security issue has been found in a supported version of .NET, it should be reported to the Microsoft Security Response Center (MSRC) via the [MSRC Researcher Portal](https://msrc.microsoft.com/report/vulnerability/new). Further information can be found in the MSRC [Report an Issue FAQ](https://www.microsoft.com/msrc/faqs-report-an-issue).\n\nSecurity reports made through MSRC may qualify for the Microsoft .NET Bounty. Details of the Microsoft .NET Bounty Program including terms and conditions are at https://aka.ms/corebounty.\n\n### Support\n\nQuestions about this issue can be asked on GitHub in the .NET GitHub organization. The main repos are located at https://github.com/dotnet/runtime. The Announcements repo (https://github.com/dotnet/Announcements) will contain this bulletin as an issue and will include a link to a discussion issue. Questions can be asked in the linked discussion issue.\n\n### Disclaimer\n\nThe information provided in this advisory is provided \"as is\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.\n\n### External Links\n\n[CVE-2026-26127](https://www.cve.org/CVERecord?id=CVE-2026-26127)\n\n### Revisions\n\nV1.0 (March 10, 2026): Advisory published.", "title": "github - https://github.com/advisories/GHSA-73j8-2gch-69rq" }, { "category": "description", "text": "A flaw was found in .NET. An unauthorized attacker can exploit an out-of-bounds read vulnerability over a network, leading to a Denial of Service (DoS). This can prevent legitimate users from accessing the affected service.", "title": "redhat - https://access.redhat.com/security/cve/CVE-2026-26127" }, { "category": "description", "text": "A flaw was found in .NET. An unauthorized attacker can exploit an out-of-bounds read vulnerability over a network, leading to a Denial of Service (DoS). This can prevent legitimate users from accessing the affected service.", "title": "redhat - https://access.redhat.com/errata/RHSA-2026:4456" }, { "category": "description", "text": "A flaw was found in .NET. An unauthorized attacker can exploit an out-of-bounds read vulnerability over a network, leading to a Denial of Service (DoS). This can prevent legitimate users from accessing the affected service.", "title": "redhat - https://access.redhat.com/errata/RHSA-2026:4443" }, { "category": "description", "text": "A flaw was found in .NET. An unauthorized attacker can exploit an out-of-bounds read vulnerability over a network, leading to a Denial of Service (DoS). This can prevent legitimate users from accessing the affected service.", "title": "redhat - https://access.redhat.com/errata/RHSA-2026:4450" }, { "category": "description", "text": "A flaw was found in .NET. An unauthorized attacker can exploit an out-of-bounds read vulnerability over a network, leading to a Denial of Service (DoS). This can prevent legitimate users from accessing the affected service.", "title": "redhat - https://access.redhat.com/errata/RHSA-2026:4453" }, { "category": "description", "text": "A flaw was found in .NET. An unauthorized attacker can exploit an out-of-bounds read vulnerability over a network, leading to a Denial of Service (DoS). This can prevent legitimate users from accessing the affected service.", "title": "redhat - https://access.redhat.com/errata/RHSA-2026:4458" }, { "category": "description", "text": "A flaw was found in .NET. An unauthorized attacker can exploit an out-of-bounds read vulnerability over a network, leading to a Denial of Service (DoS). This can prevent legitimate users from accessing the affected service.", "title": "redhat - https://access.redhat.com/errata/RHSA-2026:4445" }, { "category": "description", "text": "It was discovered that the .NET Microsoft.Bcl.Memory NuGet package did not\nproperly handle certain malformed Base64Url encoded input. An attacker could\npossibly use this issue to cause .NET to crash, resulting in a denial of\nservice. This issue only affected .NET 9.0 and .NET 10.0. (CVE-2026-26127)\n\nBartłomiej Dach discovered that .NET's SignalR server component did not\nproperly manage resource consumption when processing certain messages. An\nattacker could possibly use this issue to exhaust internal buffers, resulting\nin a denial of service. (CVE-2026-26130)", "title": "osv - https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/Ubuntu%2FUSN-8085-1.json?alt=media" }, { "category": "description", "text": "# Microsoft Security Advisory CVE-2026-26127 – .NET Denial of Service Vulnerability\n\n## Executive summary\n\nMicrosoft is releasing this security advisory to provide information about a vulnerability in .NET 9.0 and .NET 10.0. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.\n\nA denial of service vulnerability exists in .NET and Microsoft.Bcl.Memory due to an out-of-bounds read when decoding malformed Base64Url input.\n\n## Announcement\n\nAnnouncement for this issue can be found at https://github.com/dotnet/announcements/issues/384\n\n## CVSS Details\n\n- **Version:** 3.1\n- **Score:** 7.5\n- **Vector:** `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C`\n- **Severity:** High\n- **Weakness:** CWE-129 (Improper Validation of Array Index); CWE-125 (Out-of-bounds Read)\n\n## Affected Platforms\n\n- **Platforms:** All\n- **Architectures:** All\n\n## Affected Products\n\n### .NET 9\nPackage name | Affected version | Patched version\n------------ | ---------------- | -------------------------\n[Microsoft.NetCore.App.Runtime.linux-arm](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-arm) | >= 9.0.0, <= 9.0.13 | 9.0.14\n[Microsoft.NetCore.App.Runtime.linux-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-arm64) | >= 9.0.0, <= 9.0.13 | 9.0.14\n[Microsoft.NetCore.App.Runtime.linux-musl-arm](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-musl-arm) | >= 9.0.0, <= 9.0.13 | 9.0.14\n[Microsoft.NetCore.App.Runtime.linux-musl-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-musl-arm64) | >= 9.0.0, <= 9.0.13 | 9.0.14\n[Microsoft.NetCore.App.Runtime.linux-musl-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-musl-x64) | >= 9.0.0, <= 9.0.13 | 9.0.14\n[Microsoft.NetCore.App.Runtime.linux-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-x64) | >= 9.0.0, <= 9.0.13 | 9.0.14\n[Microsoft.NetCore.App.Runtime.osx-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.osx-arm64) | >= 9.0.0, <= 9.0.13 | 9.0.14\n[Microsoft.NetCore.App.Runtime.osx-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.osx-x64) | >= 9.0.0, <= 9.0.13 | 9.0.14\n[Microsoft.NetCore.App.Runtime.win-arm](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-arm) | >= 9.0.0, <= 9.0.13 | 9.0.14\n[Microsoft.NetCore.App.Runtime.win-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-arm64) | >= 9.0.0, <= 9.0.13 | 9.0.14\n[Microsoft.NetCore.App.Runtime.win-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-x64) | >= 9.0.0, <= 9.0.13 | 9.0.14\n[Microsoft.NetCore.App.Runtime.win-x86](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-x86) | >= 9.0.0, <= 9.0.13 | 9.0.14\n\n### .NET 10\nPackage name | Affected version | Patched version\n------------ | ---------------- | -------------------------\n[Microsoft.NetCore.App.Runtime.linux-arm](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-arm) | >= 10.0.0, <= 10.0.3 | 10.0.4\n[Microsoft.NetCore.App.Runtime.linux-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-arm64) | >= 10.0.0, <= 10.0.3 | 10.0.4\n[Microsoft.NetCore.App.Runtime.linux-musl-arm](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-musl-arm) | >= 10.0.0, <= 10.0.3 | 10.0.4\n[Microsoft.NetCore.App.Runtime.linux-musl-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-musl-arm64) | >= 10.0.0, <= 10.0.3 | 10.0.4\n[Microsoft.NetCore.App.Runtime.linux-musl-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-musl-x64) | >= 10.0.0, <= 10.0.3 | 10.0.4\n[Microsoft.NetCore.App.Runtime.linux-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-x64) | >= 10.0.0, <= 10.0.3 | 10.0.4\n[Microsoft.NetCore.App.Runtime.osx-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.osx-arm64) | >= 10.0.0, <= 10.0.3 | 10.0.4\n[Microsoft.NetCore.App.Runtime.osx-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.osx-x64) | >= 10.0.0, <= 10.0.3 | 10.0.4\n[Microsoft.NetCore.App.Runtime.win-arm](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-arm) | >= 10.0.0, <= 10.0.3 | 10.0.4\n[Microsoft.NetCore.App.Runtime.win-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-arm64) | >= 10.0.0, <= 10.0.3 | 10.0.4\n[Microsoft.NetCore.App.Runtime.win-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-x64) | >= 10.0.0, <= 10.0.3 | 10.0.4\n[Microsoft.NetCore.App.Runtime.win-x86](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-x86) | >= 10.0.0, <= 10.0.3 | 10.0.4\n\n### Microsoft.Bcl.Memory 9.0.14\nPackage name | Affected version | Patched version\n------------ | ---------------- | -------------------------\n[Microsoft.Bcl.Memory](https://www.nuget.org/packages/Microsoft.Bcl.Memory) | >= 9.0.0, <= 9.0.13 | 9.0.14\n\n### Microsoft.Bcl.Memory 10.0.4\nPackage name | Affected version | Patched version\n------------ | ---------------- | -------------------------\n[Microsoft.Bcl.Memory](https://www.nuget.org/packages/Microsoft.Bcl.Memory) | >= 10.0.0, <= 10.0.3 | 10.0.4\n\n### How to fix the issue\n\nTo update the Microsoft.Bcl.Memory NuGet package, apply one of the following methods:\n\nNuGet Package Manager UI in Visual Studio:\n- Open the project in Visual Studio.\n- Right-click on the project in Solution Explorer and select \"Manage NuGet Packages...\" or navigate to \"Project > Manage NuGet Packages\".\n- In the NuGet Package Manager window, select the \"Updates\" tab. This tab lists packages with available updates from the configured package sources.\n- Select the package(s) to update. A specific version can be chosen from the dropdown, or the latest available version can be selected.\n- Click the \"Update\" button.\n\nUsing the NuGet Package Manager Console in Visual Studio:\n- Open the project in Visual Studio.\n- Navigate to \"Tools > NuGet Package Manager > Package Manager Console\".\n- To update a specific package to its latest version, run the following Update-Package command:\n\n```\nUpdate-Package -Id Microsoft.Bcl.Memory\n```\n\nUsing the .NET CLI (Command Line Interface):\n- Open a terminal or command prompt in the project's directory.\n- To update a specific package to its latest version, run the following command:\n\n```\ndotnet package update Microsoft.Bcl.Memory\n```\n\nOnce the NuGet package reference has been updated, the application must be recompiled and redeployed. Additionally, it is recommended to update the runtime and/or SDKs, but unless the application targets .NET 9 or higher, updating the runtime and/or SDK is not a required step to patch this vulnerability.\n\n## Other Information\n\n### Reporting Security Issues\n\nIf a potential security issue has been found in a supported version of .NET, it should be reported to the Microsoft Security Response Center (MSRC) via the [MSRC Researcher Portal](https://msrc.microsoft.com/report/vulnerability/new). Further information can be found in the MSRC [Report an Issue FAQ](https://www.microsoft.com/msrc/faqs-report-an-issue).\n\nSecurity reports made through MSRC may qualify for the Microsoft .NET Bounty. Details of the Microsoft .NET Bounty Program including terms and conditions are at https://aka.ms/corebounty.\n\n### Support\n\nQuestions about this issue can be asked on GitHub in the .NET GitHub organization. The main repos are located at https://github.com/dotnet/runtime. The Announcements repo (https://github.com/dotnet/Announcements) will contain this bulletin as an issue and will include a link to a discussion issue. Questions can be asked in the linked discussion issue.\n\n### Disclaimer\n\nThe information provided in this advisory is provided \"as is\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.\n\n### External Links\n\n[CVE-2026-26127](https://www.cve.org/CVERecord?id=CVE-2026-26127)\n\n### Revisions\n\nV1.0 (March 10, 2026): Advisory published.", "title": "github - https://api.github.com/advisories/GHSA-73j8-2gch-69rq" }, { "category": "description", "text": "Out-of-bounds read in .NET allows an unauthorized attacker to deny service over a network.", "title": "cveprojectv5 - https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/26xxx/CVE-2026-26127.json" }, { "category": "description", "text": "# Microsoft Security Advisory CVE-2026-26127 – .NET Denial of Service Vulnerability\n\n## Executive summary\n\nMicrosoft is releasing this security advisory to provide information about a vulnerability in .NET 9.0 and .NET 10.0. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.\n\nA denial of service vulnerability exists in .NET and Microsoft.Bcl.Memory due to an out-of-bounds read when decoding malformed Base64Url input.\n\n## Announcement\n\nAnnouncement for this issue can be found at https://github.com/dotnet/announcements/issues/384\n\n## CVSS Details\n\n- **Version:** 3.1\n- **Score:** 7.5\n- **Vector:** `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C`\n- **Severity:** High\n- **Weakness:** CWE-129 (Improper Validation of Array Index); CWE-125 (Out-of-bounds Read)\n\n## Affected Platforms\n\n- **Platforms:** All\n- **Architectures:** All\n\n## Affected Products\n\n### .NET 9\nPackage name | Affected version | Patched version\n------------ | ---------------- | -------------------------\n[Microsoft.NetCore.App.Runtime.linux-arm](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-arm) | >= 9.0.0, <= 9.0.13 | 9.0.14\n[Microsoft.NetCore.App.Runtime.linux-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-arm64) | >= 9.0.0, <= 9.0.13 | 9.0.14\n[Microsoft.NetCore.App.Runtime.linux-musl-arm](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-musl-arm) | >= 9.0.0, <= 9.0.13 | 9.0.14\n[Microsoft.NetCore.App.Runtime.linux-musl-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-musl-arm64) | >= 9.0.0, <= 9.0.13 | 9.0.14\n[Microsoft.NetCore.App.Runtime.linux-musl-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-musl-x64) | >= 9.0.0, <= 9.0.13 | 9.0.14\n[Microsoft.NetCore.App.Runtime.linux-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-x64) | >= 9.0.0, <= 9.0.13 | 9.0.14\n[Microsoft.NetCore.App.Runtime.osx-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.osx-arm64) | >= 9.0.0, <= 9.0.13 | 9.0.14\n[Microsoft.NetCore.App.Runtime.osx-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.osx-x64) | >= 9.0.0, <= 9.0.13 | 9.0.14\n[Microsoft.NetCore.App.Runtime.win-arm](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-arm) | >= 9.0.0, <= 9.0.13 | 9.0.14\n[Microsoft.NetCore.App.Runtime.win-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-arm64) | >= 9.0.0, <= 9.0.13 | 9.0.14\n[Microsoft.NetCore.App.Runtime.win-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-x64) | >= 9.0.0, <= 9.0.13 | 9.0.14\n[Microsoft.NetCore.App.Runtime.win-x86](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-x86) | >= 9.0.0, <= 9.0.13 | 9.0.14\n\n### .NET 10\nPackage name | Affected version | Patched version\n------------ | ---------------- | -------------------------\n[Microsoft.NetCore.App.Runtime.linux-arm](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-arm) | >= 10.0.0, <= 10.0.3 | 10.0.4\n[Microsoft.NetCore.App.Runtime.linux-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-arm64) | >= 10.0.0, <= 10.0.3 | 10.0.4\n[Microsoft.NetCore.App.Runtime.linux-musl-arm](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-musl-arm) | >= 10.0.0, <= 10.0.3 | 10.0.4\n[Microsoft.NetCore.App.Runtime.linux-musl-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-musl-arm64) | >= 10.0.0, <= 10.0.3 | 10.0.4\n[Microsoft.NetCore.App.Runtime.linux-musl-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-musl-x64) | >= 10.0.0, <= 10.0.3 | 10.0.4\n[Microsoft.NetCore.App.Runtime.linux-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-x64) | >= 10.0.0, <= 10.0.3 | 10.0.4\n[Microsoft.NetCore.App.Runtime.osx-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.osx-arm64) | >= 10.0.0, <= 10.0.3 | 10.0.4\n[Microsoft.NetCore.App.Runtime.osx-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.osx-x64) | >= 10.0.0, <= 10.0.3 | 10.0.4\n[Microsoft.NetCore.App.Runtime.win-arm](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-arm) | >= 10.0.0, <= 10.0.3 | 10.0.4\n[Microsoft.NetCore.App.Runtime.win-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-arm64) | >= 10.0.0, <= 10.0.3 | 10.0.4\n[Microsoft.NetCore.App.Runtime.win-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-x64) | >= 10.0.0, <= 10.0.3 | 10.0.4\n[Microsoft.NetCore.App.Runtime.win-x86](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-x86) | >= 10.0.0, <= 10.0.3 | 10.0.4\n\n### Microsoft.Bcl.Memory 9.0.14\nPackage name | Affected version | Patched version\n------------ | ---------------- | -------------------------\n[Microsoft.Bcl.Memory](https://www.nuget.org/packages/Microsoft.Bcl.Memory) | >= 9.0.0, <= 9.0.13 | 9.0.14\n\n### Microsoft.Bcl.Memory 10.0.4\nPackage name | Affected version | Patched version\n------------ | ---------------- | -------------------------\n[Microsoft.Bcl.Memory](https://www.nuget.org/packages/Microsoft.Bcl.Memory) | >= 10.0.0, <= 10.0.3 | 10.0.4\n\n### How to fix the issue\n\nTo update the Microsoft.Bcl.Memory NuGet package, apply one of the following methods:\n\nNuGet Package Manager UI in Visual Studio:\n- Open the project in Visual Studio.\n- Right-click on the project in Solution Explorer and select \"Manage NuGet Packages...\" or navigate to \"Project > Manage NuGet Packages\".\n- In the NuGet Package Manager window, select the \"Updates\" tab. This tab lists packages with available updates from the configured package sources.\n- Select the package(s) to update. A specific version can be chosen from the dropdown, or the latest available version can be selected.\n- Click the \"Update\" button.\n\nUsing the NuGet Package Manager Console in Visual Studio:\n- Open the project in Visual Studio.\n- Navigate to \"Tools > NuGet Package Manager > Package Manager Console\".\n- To update a specific package to its latest version, run the following Update-Package command:\n\n```\nUpdate-Package -Id Microsoft.Bcl.Memory\n```\n\nUsing the .NET CLI (Command Line Interface):\n- Open a terminal or command prompt in the project's directory.\n- To update a specific package to its latest version, run the following command:\n\n```\ndotnet package update Microsoft.Bcl.Memory\n```\n\nOnce the NuGet package reference has been updated, the application must be recompiled and redeployed. Additionally, it is recommended to update the runtime and/or SDKs, but unless the application targets .NET 9 or higher, updating the runtime and/or SDK is not a required step to patch this vulnerability.\n\n## Other Information\n\n### Reporting Security Issues\n\nIf a potential security issue has been found in a supported version of .NET, it should be reported to the Microsoft Security Response Center (MSRC) via the [MSRC Researcher Portal](https://msrc.microsoft.com/report/vulnerability/new). Further information can be found in the MSRC [Report an Issue FAQ](https://www.microsoft.com/msrc/faqs-report-an-issue).\n\nSecurity reports made through MSRC may qualify for the Microsoft .NET Bounty. Details of the Microsoft .NET Bounty Program including terms and conditions are at https://aka.ms/corebounty.\n\n### Support\n\nQuestions about this issue can be asked on GitHub in the .NET GitHub organization. The main repos are located at https://github.com/dotnet/runtime. The Announcements repo (https://github.com/dotnet/Announcements) will contain this bulletin as an issue and will include a link to a discussion issue. Questions can be asked in the linked discussion issue.\n\n### Disclaimer\n\nThe information provided in this advisory is provided \"as is\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.\n\n### External Links\n\n[CVE-2026-26127](https://www.cve.org/CVERecord?id=CVE-2026-26127)\n\n### Revisions\n\nV1.0 (March 10, 2026): Advisory published.", "title": "osv - https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/NuGet%2FGHSA-73j8-2gch-69rq.json?alt=media" }, { "category": "description", "text": "Out-of-bounds read in .NET allows an unauthorized attacker to deny service over a network.", "title": "nvd - https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-26127" }, { "category": "other", "text": "0.00038", "title": "EPSS" }, { "category": "other", "text": "7.1", "title": "NCSC Score" }, { "category": "other", "text": "There is news data available from source Bleepingcomputer, VENDOR FIX as product remediation category, There is product data available from source Certbundde, There is product data available from a private source, IMPACT as product threat category, There is cvss data available from a private source", "title": "NCSC Score top increasing factors" }, { "category": "other", "text": "There is product_remediation data available from source Redhat", "title": "NCSC Score top decreasing factors" }, { "category": "details", "text": "Severity: 2\n", "title": "Vendor assessment" } ], "product_status": { "fixed": [ "CSAFPID-1432758", "CSAFPID-5811516", "CSAFPID-5811517", "CSAFPID-5811518", "CSAFPID-5811519", "CSAFPID-5811520", "CSAFPID-5811521", "CSAFPID-5811522", "CSAFPID-5811523", "CSAFPID-5811524", "CSAFPID-5811525", "CSAFPID-5811526", "CSAFPID-5811527", "CSAFPID-5811528", "CSAFPID-5811529", "CSAFPID-5811530", "CSAFPID-5811531", "CSAFPID-5811532", "CSAFPID-5811533", "CSAFPID-5811534", "CSAFPID-5811535", "CSAFPID-5811536", "CSAFPID-5811537", "CSAFPID-1432908", "CSAFPID-5811660", "CSAFPID-5811661", "CSAFPID-5811662", "CSAFPID-5811663", "CSAFPID-5811664", "CSAFPID-5811665", "CSAFPID-5811666", "CSAFPID-5811667", "CSAFPID-5811668", "CSAFPID-5811669", "CSAFPID-5811670", "CSAFPID-5811671", "CSAFPID-5811672", "CSAFPID-5811673", "CSAFPID-5811674", "CSAFPID-5811675", "CSAFPID-5811676", "CSAFPID-5811677", "CSAFPID-5811678", "CSAFPID-5811679", "CSAFPID-5811680", "CSAFPID-5811681", "CSAFPID-5180289", "CSAFPID-5813838", "CSAFPID-5813839", "CSAFPID-5813840", "CSAFPID-5813841", "CSAFPID-5813842", "CSAFPID-5813843", "CSAFPID-5813844", "CSAFPID-5813845", "CSAFPID-5813846", "CSAFPID-5813847", "CSAFPID-5813848", "CSAFPID-5813849", "CSAFPID-5813850", "CSAFPID-5813851", "CSAFPID-5813852", "CSAFPID-5813853", "CSAFPID-5813854", "CSAFPID-5813855", "CSAFPID-5813856", "CSAFPID-5813857", "CSAFPID-5813858", "CSAFPID-5813859", "CSAFPID-5813860", "CSAFPID-5813861", "CSAFPID-5813862", "CSAFPID-5813863", "CSAFPID-5813864", "CSAFPID-5813865", "CSAFPID-5813866", "CSAFPID-5813867", "CSAFPID-5813868", "CSAFPID-5813869", "CSAFPID-5813870", "CSAFPID-5813871", "CSAFPID-5813872", "CSAFPID-5813873", "CSAFPID-5813874", "CSAFPID-5813875", "CSAFPID-5813876", "CSAFPID-5813877", "CSAFPID-5813878", "CSAFPID-5813879", "CSAFPID-5813880", "CSAFPID-5813968", "CSAFPID-5813969", "CSAFPID-5813970", "CSAFPID-5813971", "CSAFPID-5813972", "CSAFPID-5813973", "CSAFPID-5813974", "CSAFPID-5813975", "CSAFPID-5813976", "CSAFPID-5813977", "CSAFPID-5813978", "CSAFPID-5813979", "CSAFPID-5813980", "CSAFPID-5813981", "CSAFPID-5813982", "CSAFPID-5813983", "CSAFPID-5813984", "CSAFPID-5813985", "CSAFPID-5813986", "CSAFPID-5813987", "CSAFPID-5813988", "CSAFPID-5813989", "CSAFPID-5813990", "CSAFPID-5813991", "CSAFPID-5814507", "CSAFPID-5814508", "CSAFPID-5814509", "CSAFPID-5814510", "CSAFPID-5814511", "CSAFPID-5814512", "CSAFPID-5814513", "CSAFPID-5814514", "CSAFPID-5814515", "CSAFPID-5814516", "CSAFPID-5814517", "CSAFPID-5814518", "CSAFPID-5814519", "CSAFPID-5814520", "CSAFPID-5814521", "CSAFPID-5814522", "CSAFPID-5814523", "CSAFPID-5814524", "CSAFPID-5814525", "CSAFPID-5814526", "CSAFPID-5814527", "CSAFPID-5814528", "CSAFPID-5814529" ], "known_affected": [ "CSAFPID-5775344", "CSAFPID-5775345", "CSAFPID-5775346", "CSAFPID-5775347", "CSAFPID-1441526", "CSAFPID-1441527", "CSAFPID-1441528", "CSAFPID-5590017", "CSAFPID-5590018", "CSAFPID-5590019", "CSAFPID-5775785", "CSAFPID-5775786", "CSAFPID-2470409", "CSAFPID-2470410", "CSAFPID-5793557", "CSAFPID-1317175", "CSAFPID-5810232", "CSAFPID-5810233", "CSAFPID-1439317", "CSAFPID-1439319", "CSAFPID-5183811", "CSAFPID-5811171", "CSAFPID-5811175", "CSAFPID-5811178", "CSAFPID-5811182", "CSAFPID-5811184", "CSAFPID-5811188", "CSAFPID-1317177", "CSAFPID-1330299", "CSAFPID-5827451", "CSAFPID-5827452", "CSAFPID-5827453", "CSAFPID-5827454", "CSAFPID-5827455", "CSAFPID-5827456", "CSAFPID-5827457", "CSAFPID-5827458", "CSAFPID-5827459", "CSAFPID-5827460", "CSAFPID-5827461", "CSAFPID-5827462", "CSAFPID-5827463", "CSAFPID-5827464", "CSAFPID-5827465", "CSAFPID-5827466", "CSAFPID-5827467", "CSAFPID-5827468", "CSAFPID-5827469", "CSAFPID-5827470", "CSAFPID-5827471", "CSAFPID-5827472", "CSAFPID-5827473", "CSAFPID-5827474", "CSAFPID-5827475", "CSAFPID-5827476", "CSAFPID-5827477", "CSAFPID-5827478", "CSAFPID-5827479", "CSAFPID-5827480", "CSAFPID-5827481", "CSAFPID-5827482", "CSAFPID-5827483", "CSAFPID-5827484", "CSAFPID-5827485", "CSAFPID-5827486", "CSAFPID-5827487", "CSAFPID-5827488", "CSAFPID-5827489", "CSAFPID-5827490", "CSAFPID-5827491", "CSAFPID-5827492", "CSAFPID-5827493", "CSAFPID-5827494", "CSAFPID-5827495", "CSAFPID-5827496", "CSAFPID-5827497", "CSAFPID-5827498", "CSAFPID-5827499", "CSAFPID-5827500", "CSAFPID-5827501", "CSAFPID-5827502", "CSAFPID-5827503", "CSAFPID-5827504", "CSAFPID-5827505", "CSAFPID-5827506", "CSAFPID-5827507", "CSAFPID-5827508", "CSAFPID-5827509", "CSAFPID-5827510", "CSAFPID-5827511", "CSAFPID-5827512", "CSAFPID-5827513", "CSAFPID-5827514", "CSAFPID-5827515", "CSAFPID-5827516", "CSAFPID-5827517", "CSAFPID-5827518", "CSAFPID-5827519", "CSAFPID-5827520", "CSAFPID-5827521", "CSAFPID-5827522", "CSAFPID-5827523", "CSAFPID-5827524", "CSAFPID-5827525", "CSAFPID-5827526", "CSAFPID-5827527", "CSAFPID-5827528", "CSAFPID-5827529", "CSAFPID-5827530", "CSAFPID-5827531", "CSAFPID-5827532", "CSAFPID-5827533", "CSAFPID-1330300", "CSAFPID-5510778", "CSAFPID-5510780", "CSAFPID-5510782", "CSAFPID-5510784", "CSAFPID-5510786", "CSAFPID-5510788", "CSAFPID-5510790", "CSAFPID-5510792", "CSAFPID-5510795", "CSAFPID-5510797", "CSAFPID-5510799", "CSAFPID-5546350", "CSAFPID-5546351", "CSAFPID-5546352", "CSAFPID-5546353", "CSAFPID-5546354", "CSAFPID-5546356", "CSAFPID-5546357", "CSAFPID-5546358", "CSAFPID-5546359", "CSAFPID-5546360", "CSAFPID-5546362", "CSAFPID-5546363", "CSAFPID-5546364", "CSAFPID-5546365", "CSAFPID-5546366", "CSAFPID-5546368", "CSAFPID-5546369", "CSAFPID-5546370", "CSAFPID-5546371", "CSAFPID-5546372", "CSAFPID-5546374", "CSAFPID-5546375", "CSAFPID-5546376", "CSAFPID-5546377", "CSAFPID-5546378", "CSAFPID-5546380", "CSAFPID-5546381", "CSAFPID-5546382", "CSAFPID-5546383", "CSAFPID-5546384", "CSAFPID-5546386", "CSAFPID-5546387", "CSAFPID-5546388", "CSAFPID-5546389", "CSAFPID-5546390", "CSAFPID-5546392", "CSAFPID-5546393", "CSAFPID-5546394", "CSAFPID-5546395", "CSAFPID-5546396", "CSAFPID-5546399", "CSAFPID-5546400", "CSAFPID-5546401", "CSAFPID-5546402", "CSAFPID-5546403", "CSAFPID-5546405", "CSAFPID-5546406", "CSAFPID-5546407", "CSAFPID-5546408", "CSAFPID-5546409", "CSAFPID-5546411", "CSAFPID-5546412", "CSAFPID-5546413", "CSAFPID-5546414", "CSAFPID-5546415", "CSAFPID-5548782", "CSAFPID-5548783", "CSAFPID-5548784", "CSAFPID-5548785", "CSAFPID-5548787", "CSAFPID-5548788", "CSAFPID-5548789", "CSAFPID-5548790", "CSAFPID-5548792", "CSAFPID-5548793", "CSAFPID-5548794", "CSAFPID-5548795", "CSAFPID-5548797", "CSAFPID-5548798", "CSAFPID-5548799", "CSAFPID-5548800", "CSAFPID-5548802", "CSAFPID-5548803", "CSAFPID-5548804", "CSAFPID-5548805", "CSAFPID-5548807", "CSAFPID-5548808", "CSAFPID-5548809", "CSAFPID-5548810", "CSAFPID-5548812", "CSAFPID-5548813", "CSAFPID-5548814", "CSAFPID-5548815", "CSAFPID-5548817", "CSAFPID-5548818", "CSAFPID-5548819", "CSAFPID-5548820", "CSAFPID-5548823", "CSAFPID-5548824", "CSAFPID-5548825", "CSAFPID-5548826", "CSAFPID-5548828", "CSAFPID-5548829", "CSAFPID-5548830", "CSAFPID-5548831", "CSAFPID-5548833", "CSAFPID-5548834", "CSAFPID-5548835", "CSAFPID-5548836", "CSAFPID-5907421", "CSAFPID-5907422", "CSAFPID-5907423", "CSAFPID-5907424", "CSAFPID-5907425", "CSAFPID-5907426", "CSAFPID-5907427", "CSAFPID-5907429", "CSAFPID-5907430", "CSAFPID-5907431", "CSAFPID-5907432", "CSAFPID-5907433", "CSAFPID-5907434", "CSAFPID-5907435", "CSAFPID-5907436", "CSAFPID-5907437", "CSAFPID-5907438", "CSAFPID-5907439", "CSAFPID-5907440", "CSAFPID-5907441", "CSAFPID-5907442", "CSAFPID-5907443", "CSAFPID-5907444", "CSAFPID-5907445", "CSAFPID-5907446", "CSAFPID-5907447", "CSAFPID-5907448", "CSAFPID-5907449", "CSAFPID-5907450", "CSAFPID-5907451", "CSAFPID-5907452", "CSAFPID-5907453", "CSAFPID-5907454", "CSAFPID-5907455", "CSAFPID-5907456", "CSAFPID-5907457", "CSAFPID-5907458", "CSAFPID-5907459", "CSAFPID-5907461", "CSAFPID-5907463", "CSAFPID-5907464", "CSAFPID-5907465", "CSAFPID-5907466", "CSAFPID-5907467", "CSAFPID-5907468", "CSAFPID-5907469", "CSAFPID-5907470", "CSAFPID-5907471", "CSAFPID-5907472", "CSAFPID-5907473", "CSAFPID-5907474", "CSAFPID-5907475", "CSAFPID-5907476", "CSAFPID-5907477", "CSAFPID-5907478", "CSAFPID-5907479", "CSAFPID-5907480", "CSAFPID-5907481", "CSAFPID-5907482", "CSAFPID-5907483", "CSAFPID-5907484", "CSAFPID-5907485", "CSAFPID-5907486", "CSAFPID-5907487", "CSAFPID-5907488", "CSAFPID-5907489", "CSAFPID-5907490", "CSAFPID-5907491", "CSAFPID-5907492", "CSAFPID-5907493", "CSAFPID-5907494", "CSAFPID-5907495", "CSAFPID-5907496", "CSAFPID-5907497", "CSAFPID-5907498", "CSAFPID-5907499", "CSAFPID-5907500", "CSAFPID-5907501", "CSAFPID-5907502", "CSAFPID-5907503", "CSAFPID-5907504", "CSAFPID-5907505", "CSAFPID-5907506", "CSAFPID-5907508", "CSAFPID-5907509", "CSAFPID-5907510", "CSAFPID-5907511", "CSAFPID-5907512", "CSAFPID-5907513", "CSAFPID-5907514", "CSAFPID-5907515", "CSAFPID-5907516", "CSAFPID-5907517", "CSAFPID-5907518", "CSAFPID-5907519", "CSAFPID-5907520", "CSAFPID-5907521", "CSAFPID-5907522", "CSAFPID-5907523", "CSAFPID-5907524", "CSAFPID-5907525", "CSAFPID-5907526", "CSAFPID-5907527", "CSAFPID-5907528", "CSAFPID-5907529", "CSAFPID-5907530", "CSAFPID-5907531", "CSAFPID-5907532", "CSAFPID-5907533", "CSAFPID-5907534", "CSAFPID-5907535", "CSAFPID-5907536", "CSAFPID-5907537", "CSAFPID-5907538", "CSAFPID-5907539", "CSAFPID-5907540", "CSAFPID-5907541", "CSAFPID-5907542", "CSAFPID-5907543", "CSAFPID-5907544", "CSAFPID-5907545", "CSAFPID-5907546", "CSAFPID-5907547", "CSAFPID-5907548", "CSAFPID-5907549", "CSAFPID-5907550", "CSAFPID-5907551", "CSAFPID-5907552", "CSAFPID-5907553", "CSAFPID-5907554", "CSAFPID-5907555", "CSAFPID-5907556", "CSAFPID-5982862", "CSAFPID-5982863", "CSAFPID-5982864", "CSAFPID-5982865" ], "known_not_affected": [ "CSAFPID-1459359", "CSAFPID-1780155", "CSAFPID-1780157", "CSAFPID-1780158", "CSAFPID-2858634", "CSAFPID-5811195" ] }, "references": [ { "category": "external", "summary": "Source - cveprojectv5", "url": "https://www.cve.org/CVERecord?id=CVE-2026-26127" }, { "category": "external", "summary": "Source raw - cveprojectv5", "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/26xxx/CVE-2026-26127.json" }, { "category": "external", "summary": "Source - microsoft", "url": "https://api.msrc.microsoft.com/cvrf/v3.0/cvrf/2026-Mar" }, { "category": "external", "summary": "Source - bleepingcomputer", "url": "https://www.bleepingcomputer.com/news/microsoft/microsoft-march-2026-patch-tuesday-fixes-2-zero-days-79-flaws/" }, { "category": "external", "summary": "Source - nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-26127" }, { "category": "external", "summary": "Source raw - nvd", "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-26127" }, { "category": "external", "summary": "Source - securityweek", "url": "https://www.securityweek.com/microsoft-patches-83-vulnerabilities/" }, { "category": "external", "summary": "Source - ncscclear", "url": "https://advisories.ncsc.nl/advisory?id=NCSC-2026-0085" }, { "category": "external", "summary": "Source - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0657.json" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-26127" }, { "category": "external", "summary": "Source raw - first", "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0" }, { "category": "external", "summary": "Source - github", "url": "https://github.com/advisories/GHSA-73j8-2gch-69rq" }, { "category": "external", "summary": "Source raw - github", "url": "https://api.github.com/advisories/GHSA-73j8-2gch-69rq" }, { "category": "external", "summary": "Source - redhat", "url": "https://access.redhat.com/security/cve/CVE-2026-26127" }, { "category": "external", "summary": "Source raw - redhat", "url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-26127.json" }, { "category": "external", "summary": "Source - redhat", "url": "https://access.redhat.com/errata/RHSA-2026:4456" }, { "category": "external", "summary": "Source raw - redhat", "url": "https://access.redhat.com/hydra/rest/securitydata/csaf/RHSA-2026:4456.json" }, { "category": "external", "summary": "Source - redhat", "url": "https://access.redhat.com/errata/RHSA-2026:4443" }, { "category": "external", "summary": "Source raw - redhat", "url": "https://access.redhat.com/hydra/rest/securitydata/csaf/RHSA-2026:4443.json" }, { "category": "external", "summary": "Source - redhat", "url": "https://access.redhat.com/errata/RHSA-2026:4450" }, { "category": "external", "summary": "Source raw - redhat", "url": "https://access.redhat.com/hydra/rest/securitydata/csaf/RHSA-2026:4450.json" }, { "category": "external", "summary": "Source - redhat", "url": "https://access.redhat.com/errata/RHSA-2026:4453" }, { "category": "external", "summary": "Source raw - redhat", "url": "https://access.redhat.com/hydra/rest/securitydata/csaf/RHSA-2026:4453.json" }, { "category": "external", "summary": "Source - redhat", "url": "https://access.redhat.com/errata/RHSA-2026:4458" }, { "category": "external", "summary": "Source raw - redhat", "url": "https://access.redhat.com/hydra/rest/securitydata/csaf/RHSA-2026:4458.json" }, { "category": "external", "summary": "Source - redhat", "url": "https://access.redhat.com/errata/RHSA-2026:4445" }, { "category": "external", "summary": "Source raw - redhat", "url": "https://access.redhat.com/hydra/rest/securitydata/csaf/RHSA-2026:4445.json" }, { "category": "external", "summary": "Source - osv", "url": "https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/Ubuntu%2FUSN-8085-1.json?alt=media" }, { "category": "external", "summary": "Source - github", "url": "https://api.github.com/advisories/GHSA-73j8-2gch-69rq" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0" }, { "category": "external", "summary": "Source - cveprojectv5", "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/26xxx/CVE-2026-26127.json" }, { "category": "external", "summary": "Source - osv", "url": "https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/NuGet%2FGHSA-73j8-2gch-69rq.json?alt=media" }, { "category": "external", "summary": "Source - nvd", "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-26127" }, { "category": "external", "summary": "News - bleepingcomputer", "url": "https://www.bleepingcomputer.com/news/microsoft/microsoft-march-2026-patch-tuesday-fixes-2-zero-days-79-flaws/" }, { "category": "external", "summary": "News - securityweek", "url": "https://www.securityweek.com/microsoft-patches-83-vulnerabilities/" }, { "category": "external", "summary": "Reference - cveprojectv5; github; nvd; osv; redhat", "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26127" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0657.json" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-0657" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://msrc.microsoft.com/update-guide/" }, { "category": "external", "summary": "Reference - github; osv", "url": "https://github.com/dotnet/runtime/security/advisories/GHSA-73j8-2gch-69rq" }, { "category": "external", "summary": "Reference - github; osv; redhat", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-26127" }, { "category": "external", "summary": "Reference - github", "url": "https://github.com/advisories/GHSA-73j8-2gch-69rq" }, { "category": "external", "summary": "Reference - certbundde; redhat", "url": "https://access.redhat.com/errata/RHSA-2026:4443" }, { "category": "external", "summary": "Reference - certbundde; redhat", "url": "https://access.redhat.com/errata/RHSA-2026:4450" }, { "category": "external", "summary": "Reference - redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-26127" }, { "category": "external", "summary": "Reference - redhat", "url": "https://access.redhat.com/security/cve/CVE-2026-26127" }, { "category": "external", "summary": "Reference - redhat", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2446098" }, { "category": "external", "summary": "Reference - certbundde; redhat", "url": "https://access.redhat.com/errata/RHSA-2026:4456" }, { "category": "external", "summary": "Reference - redhat", "url": "https://access.redhat.com/security/updates/classification/#important" }, { "category": "external", "summary": "Reference - redhat", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2446134" }, { "category": "external", "summary": "Reference - redhat", "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_4456.json" }, { "category": "external", "summary": "Reference - redhat", "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_4443.json" }, { "category": "external", "summary": "Reference - certbundde", "url": "http://linux.oracle.com/errata/ELSA-2026-4454.html" }, { "category": "external", "summary": "Reference - certbundde", "url": "http://linux.oracle.com/errata/ELSA-2026-4453.html" }, { "category": "external", "summary": "Reference - certbundde", "url": "http://linux.oracle.com/errata/ELSA-2026-4445.html" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://linux.oracle.com/errata/ELSA-2026-4455.html" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://linux.oracle.com/errata/ELSA-2026-4458.html" }, { "category": "external", "summary": "Reference - certbundde; redhat", "url": "https://access.redhat.com/errata/RHSA-2026:4445" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://access.redhat.com/errata/RHSA-2026:4454" }, { "category": "external", "summary": "Reference - certbundde", "url": "http://linux.oracle.com/errata/ELSA-2026-4451.html" }, { "category": "external", "summary": "Reference - certbundde", "url": "http://linux.oracle.com/errata/ELSA-2026-4450.html" }, { "category": "external", "summary": "Reference - certbundde; osv", "url": "https://ubuntu.com/security/notices/USN-8085-1" }, { "category": "external", "summary": "Reference - redhat", "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_4450.json" }, { "category": "external", "summary": "Reference - redhat", "url": "https://access.redhat.com/errata/RHSA-2026:4453" }, { "category": "external", "summary": "Reference - redhat", "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_4453.json" }, { "category": "external", "summary": "Reference - redhat", "url": "https://access.redhat.com/errata/RHSA-2026:4458" }, { "category": "external", "summary": "Reference - redhat", "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_4458.json" }, { "category": "external", "summary": "Reference - redhat", "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_4445.json" }, { "category": "external", "summary": "Reference - osv", "url": "https://ubuntu.com/security/CVE-2026-26127" }, { "category": "external", "summary": "Reference - osv", "url": "https://ubuntu.com/security/CVE-2026-26130" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://linux.oracle.com/errata/ELSA-2026-4456.html" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://errata.build.resf.org/RLSA-2026:4443" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://errata.build.resf.org/RLSA-2026:4458" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://errata.build.resf.org/RLSA-2026:4455" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://errata.build.resf.org/RLSA-2026:4456" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://errata.build.resf.org/RLSA-2026:4454" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://errata.build.resf.org/RLSA-2026:4453" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://errata.build.resf.org/RLSA-2026:4451" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://errata.build.resf.org/RLSA-2026:4450" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://errata.build.resf.org/RLSA-2026:4445" }, { "category": "external", "summary": "Reference - certbundde", "url": "http://linux.oracle.com/errata/ELSA-2026-4443.html" } ], "remediations": [ { "category": "vendor_fix", "details": "5081278", "product_ids": [ "CSAFPID-1441526", "CSAFPID-1441527", "CSAFPID-1441528" ], "url": "https://dotnet.microsoft.com/en-us/download/dotnet/9.0" }, { "category": "vendor_fix", "details": "5081276", "product_ids": [ "CSAFPID-5590017", "CSAFPID-5590018", "CSAFPID-5590019" ], "url": "https://dotnet.microsoft.com/download/dotnet/10.0" }, { "category": "mitigation", "details": "To mitigate this issue, restrict network access to applications utilizing affected .NET components to only trusted clients or networks using firewall rules. This will limit the exposure of the vulnerable service to potential attackers. After applying firewall rules, ensure to reload or restart the network service for changes to take effect.", "product_ids": [ "CSAFPID-1439317", "CSAFPID-1439319", "CSAFPID-1459359", "CSAFPID-1780155", "CSAFPID-1780157", "CSAFPID-1780158", "CSAFPID-2858634", "CSAFPID-5183811", "CSAFPID-5811171", "CSAFPID-5811175", "CSAFPID-5811178", "CSAFPID-5811182", "CSAFPID-5811184", "CSAFPID-5811188", "CSAFPID-5811195" ] }, { "category": "vendor_fix", "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258", "product_ids": [ "CSAFPID-1432758", "CSAFPID-2837107", "CSAFPID-5811516", "CSAFPID-5811517", "CSAFPID-5811518", "CSAFPID-5811519", "CSAFPID-5811520", "CSAFPID-5811521", "CSAFPID-5811522", "CSAFPID-5811523", "CSAFPID-5811524", "CSAFPID-5811525", "CSAFPID-5811526", "CSAFPID-5811527", "CSAFPID-5811528", "CSAFPID-5811529", "CSAFPID-5811530", "CSAFPID-5811531", "CSAFPID-5811532", "CSAFPID-5811533", "CSAFPID-5811534", "CSAFPID-5811535", "CSAFPID-5811536", "CSAFPID-5811537" ], "restart_required": { "category": "none" }, "url": "https://access.redhat.com/errata/RHSA-2026:4456" }, { "category": "workaround", "details": "To mitigate this issue, restrict network access to applications utilizing affected .NET components to only trusted clients or networks using firewall rules. This will limit the exposure of the vulnerable service to potential attackers. After applying firewall rules, ensure to reload or restart the network service for changes to take effect.", "product_ids": [ "CSAFPID-1432758", "CSAFPID-2837107", "CSAFPID-5811516", "CSAFPID-5811517", "CSAFPID-5811518", "CSAFPID-5811519", "CSAFPID-5811520", "CSAFPID-5811521", "CSAFPID-5811522", "CSAFPID-5811523", "CSAFPID-5811524", "CSAFPID-5811525", "CSAFPID-5811526", "CSAFPID-5811527", "CSAFPID-5811528", "CSAFPID-5811529", "CSAFPID-5811530", "CSAFPID-5811531", "CSAFPID-5811532", "CSAFPID-5811533", "CSAFPID-5811534", "CSAFPID-5811535", "CSAFPID-5811536", "CSAFPID-5811537", "CSAFPID-1432908", "CSAFPID-1437608", "CSAFPID-5811660", "CSAFPID-5811661", "CSAFPID-5811662", "CSAFPID-5811663", "CSAFPID-5811664", "CSAFPID-5811665", "CSAFPID-5811666", "CSAFPID-5811667", "CSAFPID-5811668", "CSAFPID-5811669", "CSAFPID-5811670", "CSAFPID-5811671", "CSAFPID-5811672", "CSAFPID-5811673", "CSAFPID-5811674", "CSAFPID-5811675", "CSAFPID-5811676", "CSAFPID-5811677", "CSAFPID-5811678", "CSAFPID-5811679", "CSAFPID-5811680", "CSAFPID-5811681", "CSAFPID-5180271", "CSAFPID-5180289", "CSAFPID-5813838", "CSAFPID-5813839", "CSAFPID-5813840", "CSAFPID-5813841", "CSAFPID-5813842", "CSAFPID-5813843", "CSAFPID-5813844", "CSAFPID-5813845", "CSAFPID-5813846", "CSAFPID-5813847", "CSAFPID-5813848", "CSAFPID-5813849", "CSAFPID-5813850", "CSAFPID-5813851", "CSAFPID-5813852", "CSAFPID-5813853", "CSAFPID-5813854", "CSAFPID-5813855", "CSAFPID-5813856", "CSAFPID-5813857", "CSAFPID-5813858", "CSAFPID-5813859", "CSAFPID-5813860", "CSAFPID-5813861", "CSAFPID-5813862", "CSAFPID-5813863", "CSAFPID-5813864", "CSAFPID-5813865", "CSAFPID-5813866", "CSAFPID-5813867", "CSAFPID-5813868", "CSAFPID-5813869", "CSAFPID-5813870", "CSAFPID-5813871", "CSAFPID-5813872", "CSAFPID-5813873", "CSAFPID-5813874", "CSAFPID-5813875", "CSAFPID-5813876", "CSAFPID-5813877", "CSAFPID-5813878", "CSAFPID-5813879", "CSAFPID-5813880", "CSAFPID-5813968", "CSAFPID-5813969", "CSAFPID-5813970", "CSAFPID-5813971", "CSAFPID-5813972", "CSAFPID-5813973", "CSAFPID-5813974", "CSAFPID-5813975", "CSAFPID-5813976", "CSAFPID-5813977", "CSAFPID-5813978", "CSAFPID-5813979", "CSAFPID-5813980", "CSAFPID-5813981", "CSAFPID-5813982", "CSAFPID-5813983", "CSAFPID-5813984", "CSAFPID-5813985", "CSAFPID-5813986", "CSAFPID-5813987", "CSAFPID-5813988", "CSAFPID-5813989", "CSAFPID-5813990", "CSAFPID-5813991", "CSAFPID-5814507", "CSAFPID-5814508", "CSAFPID-5814509", "CSAFPID-5814510", "CSAFPID-5814511", "CSAFPID-5814512", "CSAFPID-5814513", "CSAFPID-5814514", "CSAFPID-5814515", "CSAFPID-5814516", "CSAFPID-5814517", "CSAFPID-5814518", "CSAFPID-5814519", "CSAFPID-5814520", "CSAFPID-5814521", "CSAFPID-5814522", "CSAFPID-5814523", "CSAFPID-5814524", "CSAFPID-5814525", "CSAFPID-5814526", "CSAFPID-5814527", "CSAFPID-5814528", "CSAFPID-5814529" ] }, { "category": "vendor_fix", "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258", "product_ids": [ "CSAFPID-1432908", "CSAFPID-1437608", "CSAFPID-5811660", "CSAFPID-5811661", "CSAFPID-5811662", "CSAFPID-5811663", "CSAFPID-5811664", "CSAFPID-5811665", "CSAFPID-5811666", "CSAFPID-5811667", "CSAFPID-5811668", "CSAFPID-5811669", "CSAFPID-5811670", "CSAFPID-5811671", "CSAFPID-5811672", "CSAFPID-5811673", "CSAFPID-5811674", "CSAFPID-5811675", "CSAFPID-5811676", "CSAFPID-5811677", "CSAFPID-5811678", "CSAFPID-5811679", "CSAFPID-5811680", "CSAFPID-5811681" ], "restart_required": { "category": "none" }, "url": "https://access.redhat.com/errata/RHSA-2026:4443" }, { "category": "vendor_fix", "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258", "product_ids": [ "CSAFPID-5180271", "CSAFPID-5180289", "CSAFPID-5813838", "CSAFPID-5813839", "CSAFPID-5813840", "CSAFPID-5813841", "CSAFPID-5813842", "CSAFPID-5813843", "CSAFPID-5813844", "CSAFPID-5813845", "CSAFPID-5813846", "CSAFPID-5813847", "CSAFPID-5813848", "CSAFPID-5813849", "CSAFPID-5813850", "CSAFPID-5813851", "CSAFPID-5813852", "CSAFPID-5813853", "CSAFPID-5813854", "CSAFPID-5813855", "CSAFPID-5813856", "CSAFPID-5813857", "CSAFPID-5813858" ], "restart_required": { "category": "none" }, "url": "https://access.redhat.com/errata/RHSA-2026:4450" }, { "category": "vendor_fix", "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258", "product_ids": [ "CSAFPID-5180271", "CSAFPID-5180289", "CSAFPID-5813859", "CSAFPID-5813860", "CSAFPID-5813861", "CSAFPID-5813862", "CSAFPID-5813863", "CSAFPID-5813864", "CSAFPID-5813865", "CSAFPID-5813866", "CSAFPID-5813867", "CSAFPID-5813868", "CSAFPID-5813869", "CSAFPID-5813870", "CSAFPID-5813871", "CSAFPID-5813872", "CSAFPID-5813873", "CSAFPID-5813874", "CSAFPID-5813875", "CSAFPID-5813876", "CSAFPID-5813877", "CSAFPID-5813878", "CSAFPID-5813879", "CSAFPID-5813880" ], "restart_required": { "category": "none" }, "url": "https://access.redhat.com/errata/RHSA-2026:4453" }, { "category": "vendor_fix", "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258", "product_ids": [ "CSAFPID-1432908", "CSAFPID-1437608", "CSAFPID-5813968", "CSAFPID-5813969", "CSAFPID-5813970", "CSAFPID-5813971", "CSAFPID-5813972", "CSAFPID-5813973", "CSAFPID-5813974", "CSAFPID-5813975", "CSAFPID-5813976", "CSAFPID-5813977", "CSAFPID-5813978", "CSAFPID-5813979", "CSAFPID-5813980", "CSAFPID-5813981", "CSAFPID-5813982", "CSAFPID-5813983", "CSAFPID-5813984", "CSAFPID-5813985", "CSAFPID-5813986", "CSAFPID-5813987", "CSAFPID-5813988", "CSAFPID-5813989", "CSAFPID-5813990", "CSAFPID-5813991" ], "restart_required": { "category": "none" }, "url": "https://access.redhat.com/errata/RHSA-2026:4458" }, { "category": "vendor_fix", "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258", "product_ids": [ "CSAFPID-1432758", "CSAFPID-2837107", "CSAFPID-5814507", "CSAFPID-5814508", "CSAFPID-5814509", "CSAFPID-5814510", "CSAFPID-5814511", "CSAFPID-5814512", "CSAFPID-5814513", "CSAFPID-5814514", "CSAFPID-5814515", "CSAFPID-5814516", "CSAFPID-5814517", "CSAFPID-5814518", "CSAFPID-5814519", "CSAFPID-5814520", "CSAFPID-5814521", "CSAFPID-5814522", "CSAFPID-5814523", "CSAFPID-5814524", "CSAFPID-5814525", "CSAFPID-5814526", "CSAFPID-5814527", "CSAFPID-5814528", "CSAFPID-5814529" ], "restart_required": { "category": "none" }, "url": "https://access.redhat.com/errata/RHSA-2026:4445" } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C", "baseScore": 7.5, "baseSeverity": "HIGH" }, "products": [ "CSAFPID-1317175", "CSAFPID-1317177", "CSAFPID-1330299", "CSAFPID-1330300", "CSAFPID-1439317", "CSAFPID-1439319", 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"CSAFPID-5590017", "CSAFPID-5590018", "CSAFPID-5590019", "CSAFPID-5775785", "CSAFPID-5775786" ] }, { "category": "impact", "details": "Denial of Service", "product_ids": [ "CSAFPID-1441526", "CSAFPID-1441527", "CSAFPID-1441528", "CSAFPID-5590017", "CSAFPID-5590018", "CSAFPID-5590019", "CSAFPID-5775785", "CSAFPID-5775786" ] }, { "category": "exploit_status", "details": "exploited" } ], "title": "CVE-2026-26127" } ] }