{ "document": { "category": "csaf_base", "csaf_version": "2.0", "distribution": { "tlp": { "label": "WHITE" } }, "lang": "en", "notes": [ { "category": "legal_disclaimer", "text": "The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this portal to enhance access to its information and vulnerabilities. The use of this information is subject to the following terms and conditions:\n\nThe vulnerabilities disclosed in this portal are gathered by NCSC-NL from a variety of open sources, which the user can retrieve from other platforms. NCSC-NL makes every reasonable effort to ensure that the content of this portal is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or real-time keeping up-to-date. NCSC-NL does not control nor guarantee the accuracy, relevance, timeliness or completeness of information obtained from these external sources. The vulnerabilities disclosed in this portal are intended solely for the convenience of professional parties to take appropriate measures to manage the risks posed to the cybersecurity. No rights can be derived from the information provided therein.\n\nNCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of the vulnerabilities disclosed in this portal. This includes damage resulting from the inaccuracy of incompleteness of the information contained in it.\nThe information on this page is subject to Dutch law. All disputes related to or arising from the use of this portal regarding the disclosure of vulnerabilities will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings." } ], "publisher": { "category": "coordinator", "contact_details": "cert@ncsc.nl", "name": "National Cyber Security Centre", "namespace": "https://www.ncsc.nl/" }, "title": "CVE-2026-42899", "tracking": { "current_release_date": "2026-05-13T19:33:59.376646Z", "generator": { "date": "2026-02-17T15:00:00Z", "engine": { "name": "V.E.L.M.A", "version": "1.7" } }, "id": "CVE-2026-42899", "initial_release_date": "2026-05-12T07:29:59.839456Z", "revision_history": [ { "date": "2026-05-12T07:29:59.839456Z", "number": "1", "summary": "NCSC Score created." }, { "date": "2026-05-12T17:41:18.167877Z", "number": "2", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (3).| References created (1).| CWES updated (1)." }, { "date": "2026-05-12T17:41:20.689537Z", "number": "3", "summary": "NCSC Score updated." }, { "date": "2026-05-12T18:31:20.932986Z", "number": "4", "summary": "Source connected.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (9).| Product Threats created (18).| Product Remediations created (9).| Product Identifiers created (6).| CWES updated (1).| Exploitable created." }, { "date": "2026-05-12T18:31:30.328818Z", "number": "5", "summary": "NCSC Score updated." }, { "date": "2026-05-12T18:36:06.811913Z", "number": "6", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (1).| CWES updated (1)." }, { "date": "2026-05-12T18:36:09.205961Z", "number": "7", "summary": "NCSC Score updated." }, { "date": "2026-05-12T21:59:43.541505Z", "number": "8", "summary": "Unknown change." }, { "date": "2026-05-13T01:03:25.272529Z", "number": "9", "summary": "Source connected.| CVE status created. (valid)| News created (1)." }, { "date": "2026-05-13T01:03:28.373485Z", "number": "10", "summary": "NCSC Score updated." }, { "date": "2026-05-13T06:26:10.588765Z", "number": "11", "summary": "Source connected.| CVE status created. (valid)" }, { "date": "2026-05-13T09:28:32.422178Z", "number": "12", "summary": "Source connected.| CVE status created. (valid)| Products connected (36).| References created (3)." }, { "date": "2026-05-13T09:28:36.988268Z", "number": "13", "summary": "NCSC Score updated." }, { "date": "2026-05-13T15:15:21.860266Z", "number": "14", "summary": "Source connected.| CVE status created. (valid)| EPSS created." }, { "date": "2026-05-13T15:15:32.915408Z", "number": "15", "summary": "NCSC Score updated." }, { "date": "2026-05-13T19:27:47.545541Z", "number": "16", "summary": "Products created (3).| Product Identifiers created (3)." }, { "date": "2026-05-13T19:27:49.936590Z", "number": "17", "summary": "NCSC Score updated." } ], "status": "interim", "version": "17" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/10.0 installed on linux", "product": { "name": "vers:unknown/10.0 installed on linux", "product_id": "CSAFPID-6983943" } }, { "category": "product_version_range", "name": "vers:unknown/10.0 installed on mac os", "product": { "name": "vers:unknown/10.0 installed on mac os", "product_id": "CSAFPID-6983948" } }, { "category": "product_version_range", "name": "vers:unknown/8.0 installed on linux", "product": { "name": "vers:unknown/8.0 installed on linux", "product_id": "CSAFPID-6983951" 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"vendor", "name": "Microsoft" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-42899", "cwe": { "id": "CWE-835", "name": "Loop with Unreachable Exit Condition ('Infinite Loop')" }, "notes": [ { "category": "description", "text": "Loop with unreachable exit condition ('infinite loop') in ASP.NET Core allows an unauthorized attacker to deny service over a network.", "title": "cveprojectv5 - https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/42xxx/CVE-2026-42899.json" }, { "category": "description", "text": "

Loop with unreachable exit condition ('infinite loop') in ASP.NET Core allows an unauthorized attacker to deny service over a network.

\n", "title": "microsoft - https://api.msrc.microsoft.com/cvrf/v3.0/cvrf/2026-May" }, { "category": "description", "text": "Loop with unreachable exit condition ('infinite loop') in ASP.NET Core allows an unauthorized attacker to deny service over a network.", "title": "nvd - https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-42899" }, { "category": "other", "text": "0.00039", "title": "EPSS" }, { "category": "other", "text": "6.3", "title": "NCSC Score" }, { "category": "other", "text": "There is product data available from source Certbundde, Is related to (a version of) product Windows, Is related to (a version of) an uncommon product, VENDOR FIX as product remediation category, Is related to (a version of) product Windows Server, There is news data available from source Bleepingcomputer", "title": "NCSC Score top increasing factors" }, { "category": "other", "text": "There is cwe data available from source Nvd", "title": "NCSC Score top decreasing factors" } ], "product_status": { "known_affected": [ "CSAFPID-6981244", "CSAFPID-6981245", "CSAFPID-6981246", "CSAFPID-1441526", "CSAFPID-1441527", "CSAFPID-1441528", "CSAFPID-1519978", "CSAFPID-1519979", "CSAFPID-1519980", "CSAFPID-5590017", "CSAFPID-5590018", "CSAFPID-5590019", "CSAFPID-1217586", "CSAFPID-1217587", "CSAFPID-1217589", "CSAFPID-1217591", "CSAFPID-1217593", "CSAFPID-1217594", "CSAFPID-1217604", "CSAFPID-1217606", "CSAFPID-1217608", "CSAFPID-1217610", "CSAFPID-1217611", "CSAFPID-1217614", "CSAFPID-1217615", "CSAFPID-1217616", "CSAFPID-1217617", "CSAFPID-1217620", "CSAFPID-1217621", "CSAFPID-1217622", "CSAFPID-1217623", "CSAFPID-1217624", "CSAFPID-1217626", "CSAFPID-1305079", "CSAFPID-1373389", "CSAFPID-1776503", "CSAFPID-2838422", "CSAFPID-2966210", "CSAFPID-5042522", "CSAFPID-6983943", "CSAFPID-6983944", "CSAFPID-6983945", "CSAFPID-6983946", "CSAFPID-6983947", "CSAFPID-6983948", "CSAFPID-6983949", "CSAFPID-6983950", "CSAFPID-6983951", "CSAFPID-7047393", "CSAFPID-7047394", "CSAFPID-7047395" ] }, "references": [ { "category": "external", "summary": "Source - bleepingcomputer", "url": "https://www.bleepingcomputer.com/news/microsoft/microsoft-may-2026-patch-tuesday-fixes-120-flaws-no-zero-days/" }, { "category": "external", "summary": "Source - cveprojectv5", "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/42xxx/CVE-2026-42899.json" }, { "category": "external", "summary": "Source - microsoft", "url": "https://api.msrc.microsoft.com/cvrf/v3.0/cvrf/2026-May" }, { "category": "external", "summary": "Source - nvd", "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-42899" }, { "category": "external", "summary": "Source - ncscclear", "url": "https://advisories.ncsc.nl/advisory?id=NCSC-2026-0143" }, { "category": "external", "summary": "Source - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1488.json" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0" }, { "category": "external", "summary": "News - bleepingcomputer", "url": "https://www.bleepingcomputer.com/news/microsoft/microsoft-may-2026-patch-tuesday-fixes-120-flaws-no-zero-days/" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd", "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42899" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1488.json" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-1488" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://msrc.microsoft.com/update-guide/" } ], "remediations": [ { "category": "vendor_fix", "details": "5093448", "product_ids": [ "CSAFPID-1441526", "CSAFPID-1441527", "CSAFPID-1441528" ], "url": "https://dotnet.microsoft.com/download/dotnet/9.0" }, { "category": "vendor_fix", "details": "5093447", "product_ids": [ "CSAFPID-1519978", "CSAFPID-1519979", "CSAFPID-1519980" ], "url": "https://dotnet.microsoft.com/download/dotnet/8.0" }, { "category": "vendor_fix", "details": "5093446", "product_ids": [ "CSAFPID-5590017", "CSAFPID-5590018", "CSAFPID-5590019" ], "url": "https://dotnet.microsoft.com/download/dotnet/10.0" } ], "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-1217586", "CSAFPID-1217587", "CSAFPID-1217589", "CSAFPID-1217591", "CSAFPID-1217593", "CSAFPID-1217594", "CSAFPID-1217604", "CSAFPID-1217606", "CSAFPID-1217608", "CSAFPID-1217610", "CSAFPID-1217611", "CSAFPID-1217614", "CSAFPID-1217615", "CSAFPID-1217616", "CSAFPID-1217617", "CSAFPID-1217620", "CSAFPID-1217621", "CSAFPID-1217622", "CSAFPID-1217623", "CSAFPID-1217624", "CSAFPID-1217626", "CSAFPID-1305079", "CSAFPID-1373389", "CSAFPID-1441526", "CSAFPID-1441527", "CSAFPID-1441528", "CSAFPID-1519978", "CSAFPID-1519979", "CSAFPID-1519980", "CSAFPID-1776503", "CSAFPID-2838422", "CSAFPID-2966210", "CSAFPID-5042522", "CSAFPID-5590017", "CSAFPID-5590018", "CSAFPID-5590019", "CSAFPID-6981244", "CSAFPID-6981245", "CSAFPID-6981246", "CSAFPID-6983943", "CSAFPID-6983944", "CSAFPID-6983945", "CSAFPID-6983946", "CSAFPID-6983947", "CSAFPID-6983948", "CSAFPID-6983949", "CSAFPID-6983950", "CSAFPID-6983951", "CSAFPID-7047393", "CSAFPID-7047394", "CSAFPID-7047395" ] } ], "threats": [ { "category": "exploit_status", "details": "Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Unlikely", "product_ids": [ "CSAFPID-1441526", "CSAFPID-1441527", "CSAFPID-1441528", "CSAFPID-1519978", "CSAFPID-1519979", "CSAFPID-1519980", "CSAFPID-5590017", "CSAFPID-5590018", "CSAFPID-5590019" ] }, { "category": "impact", "details": "Denial of Service", "product_ids": [ "CSAFPID-1441526", "CSAFPID-1441527", "CSAFPID-1441528", "CSAFPID-1519978", "CSAFPID-1519979", "CSAFPID-1519980", "CSAFPID-5590017", "CSAFPID-5590018", "CSAFPID-5590019" ] }, { "category": "exploit_status", "details": "exploited" } ], "title": "CVE-2026-42899" } ] }