{ "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-2026-27623", "tracking": { "current_release_date": "2026-03-26T06:00:52.382195Z", "generator": { "date": "2026-02-17T15:00:00Z", "engine": { "name": "V.E.L.M.A", "version": "1.7" } }, "id": "CVE-2026-27623", "initial_release_date": "2026-02-23T20:38:59.368719Z", "revision_history": [ { "date": "2026-02-23T20:38:59.368719Z", "number": "1", "summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (1).| References created (1).| CWES updated (1)." }, { "date": "2026-02-23T20:39:01.560475Z", "number": "2", "summary": "NCSC Score created." }, { "date": "2026-02-23T21:27:41.138880Z", "number": "3", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (1).| CWES updated (1)." }, { "date": "2026-02-23T21:27:45.409731Z", "number": "4", "summary": "NCSC Score updated." }, { "date": "2026-02-24T12:27:44.370301Z", "number": "5", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (4).| Product Identifiers created (2).| Product Remediations created (4).| References created (3).| CWES updated (1).| Vendor_assessment created." }, { "date": "2026-02-24T12:27:47.183141Z", "number": "6", "summary": "NCSC Score updated." }, { "date": "2026-02-24T14:11:52.275251Z", "number": "7", "summary": "Source created.| CVE status created. (valid)| EPSS created." }, { "date": "2026-02-25T00:20:06.033910Z", "number": "8", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (2).| Products created (1).| References created (3).| CWES updated (1)." }, { "date": "2026-02-25T00:43:57.054771Z", "number": "9", "summary": "Source created.| CVE status created. (valid)| Description created for source." }, { "date": "2026-02-25T02:41:55.197291Z", "number": "10", "summary": "Source connected.| CVE status created. (valid)" }, { "date": "2026-02-25T17:22:56.543408Z", "number": "11", "summary": "Unknown change." }, { "date": "2026-02-25T18:27:29.918400Z", "number": "12", "summary": "Products created (1).| Product Identifiers created (1)." }, { "date": "2026-02-25T18:27:37.036288Z", "number": "13", "summary": "NCSC Score updated." }, { "date": "2026-02-26T12:07:01.208109Z", "number": "14", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (1).| References created (2)." }, { "date": "2026-03-20T09:40:29.140083Z", "number": "15", "summary": "Source connected.| CVE status created. (valid)| EPSS created." }, { "date": "2026-03-25T12:19:55.643733Z", "number": "16", "summary": "Source connected.| CVE status created. (valid)| Description created for source.| CVSS created.| CWES updated (1)." } ], "status": "interim", "version": "16" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/10", "product": { "name": "vers:rpm/10", "product_id": "CSAFPID-2858634", "product_identification_helper": { "cpe": "cpe:/o:redhat:enterprise_linux:10" } } } ], "category": "product_name", "name": "Red Hat Enterprise Linux 10" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/9", "product": { "name": "vers:rpm/9", "product_id": "CSAFPID-1439319", "product_identification_helper": { "cpe": "cpe:/o:redhat:enterprise_linux:9" } } } ], "category": "product_name", "name": "Red Hat Enterprise Linux 9" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-2889545" } } ], "category": "product_name", "name": "valkey" } ], "category": "product_family", "name": "Red Hat Enterprise Linux 10" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-3093047" } } ], "category": "product_name", "name": "valkey" } ], "category": "product_family", "name": "Red Hat Enterprise Linux 9" } ], "category": "vendor", "name": "Red Hat" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/>=9.0.0|<9.0.3", "product": { "name": "vers:unknown/>=9.0.0|<9.0.3", "product_id": "CSAFPID-5729828" } } ], "category": "product_name", "name": "valkey" } ], "category": "vendor", "name": "Bitnami" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/>=9.0.0|<9.0.3", "product": { "name": "vers:unknown/>=9.0.0|<9.0.3", "product_id": "CSAFPID-5707847", "product_identification_helper": { "cpe": "cpe:2.3:a:lfprojects:valkey:*:*:*:*:*:*:*:*" } } } ], "category": "product_name", "name": "valkey" } ], "category": "vendor", "name": "LF Projects" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/9.0.0", "product": { "name": "vers:unknown/9.0.0", "product_id": "CSAFPID-5686899" } }, { "category": "product_version_range", "name": "vers:unknown/9.0.1", "product": { "name": "vers:unknown/9.0.1", "product_id": "CSAFPID-5686900" } }, { "category": "product_version_range", "name": "vers:unknown/9.0.2", "product": { "name": "vers:unknown/9.0.2", "product_id": "CSAFPID-5700153" } }, { "category": "product_version_range", "name": "vers:unknown/>=9.0.0|<9.0.3", "product": { "name": "vers:unknown/>=9.0.0|<9.0.3", "product_id": "CSAFPID-5677455" } } ], "category": "product_name", "name": "valkey" } ], "category": "vendor", "name": "valkey-io" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-27623", "cwe": { "id": "CWE-617", "name": "Reachable Assertion" }, "notes": [ { "category": "description", "text": "Valkey is a distributed key-value database. Starting in version 9.0.0 and prior to version 9.0.3, a malicious actor with network access to Valkey can cause the system to abort by triggering an assertion. When processing incoming requests, the Valkey system does not properly reset the networking state after processing an empty request. A malicious actor can then send a request that the server incorrectly identifies as breaking server side invariants, which results in the server shutting down. Version 9.0.3 fixes the issue. As an additional mitigation, properly isolate Valkey deployments so that only trusted users have access.", "title": "cveprojectv5 - https://www.cve.org/CVERecord?id=CVE-2026-27623" }, { "category": "description", "text": "Valkey is a distributed key-value database. Starting in version 9.0.0 and prior to version 9.0.3, a malicious actor with network access to Valkey can cause the system to abort by triggering an assertion. When processing incoming requests, the Valkey system does not properly reset the networking state after processing an empty request. A malicious actor can then send a request that the server incorrectly identifies as breaking server side invariants, which results in the server shutting down. Version 9.0.3 fixes the issue. As an additional mitigation, properly isolate Valkey deployments so that only trusted users have access.", "title": "nvd - https://nvd.nist.gov/vuln/detail/CVE-2026-27623" }, { "category": "description", "text": "A flaw was found in Valkey. A malicious actor with network access to Valkey can cause the system to shut down by sending a specially crafted request. This occurs because the system does not properly reset its networking state after processing an empty request, leading to an assertion failure. This vulnerability results in a Denial of Service (DoS), making the Valkey database unavailable.\nThis is an IMPORTANT denial-of-service vulnerability in Valkey versions 9.0.0 through 9.0.2. A remote, unauthenticated attacker with network access to a Valkey instance can send a malformed request, causing the server to terminate due to an assertion failure. This issue arises from improper state handling after processing an empty request.", "title": "redhat - https://access.redhat.com/security/cve/CVE-2026-27623" }, { "category": "description", "text": "Valkey is a distributed key-value database. Starting in version 9.0.0 and prior to version 9.0.3, a malicious actor with network access to Valkey can cause the system to abort by triggering an assertion. When processing incoming requests, the Valkey system does not properly reset the networking state after processing an empty request. A malicious actor can then send a request that the server incorrectly identifies as breaking server side invariants, which results in the server shutting down. Version 9.0.3 fixes the issue. As an additional mitigation, properly isolate Valkey deployments so that only trusted users have access.", "title": "osv - https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/GIT%2FCVE-2026-27623.json?alt=media" }, { "category": "description", "text": "Valkey is a distributed key-value database. Starting in version 9.0.0 and prior to version 9.0.3, a malicious actor with network access to Valkey can cause the system to abort by triggering an assertion. When processing incoming requests, the Valkey system does not properly reset the networking state after processing an empty request. A malicious actor can then send a request that the server incorrectly identifies as breaking server side invariants, which results in the server shutting down. Version 9.0.3 fixes the issue. As an additional mitigation, properly isolate Valkey deployments so that only trusted users have access.", "title": "debian - https://security-tracker.debian.org/tracker/CVE-2026-27623" }, { "category": "description", "text": "Valkey is a distributed key-value database. Starting in version 9.0.0 and prior to version 9.0.3, a malicious actor with network access to Valkey can cause the system to abort by triggering an assertion. When processing incoming requests, the Valkey system does not properly reset the networking state after processing an empty request. A malicious actor can then send a request that the server incorrectly identifies as breaking server side invariants, which results in the server shutting down. Version 9.0.3 fixes the issue. As an additional mitigation, properly isolate Valkey deployments so that only trusted users have access.", "title": "osv - https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/Bitnami%2FBIT-valkey-2026-27623.json?alt=media" }, { "category": "description", "text": "Valkey has Pre-Authentication DOS from malformed RESP request", "title": "microsoft - https://api.msrc.microsoft.com/cvrf/v3.0/cvrf/2026-Feb" }, { "category": "other", "text": "0.00136", "title": "EPSS" }, { "category": "other", "text": "4.7", "title": "NCSC Score" }, { "category": "other", "text": "There is product_remediation data available from source Redhat", "title": "NCSC Score top decreasing factors" }, { "category": "details", "text": "Severity: 3\n", "title": "Vendor assessment" } ], "product_status": { "known_affected": [ "CSAFPID-5677455", "CSAFPID-1439319", "CSAFPID-2858634", "CSAFPID-2889545", "CSAFPID-3093047", "CSAFPID-5686899", "CSAFPID-5686900", "CSAFPID-5700153", "CSAFPID-5707847", "CSAFPID-5729828" ] }, "references": [ { "category": "external", "summary": "Source - cveprojectv5", "url": "https://www.cve.org/CVERecord?id=CVE-2026-27623" }, { "category": "external", "summary": "Source raw - cveprojectv5", "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/27xxx/CVE-2026-27623.json" }, { "category": "external", "summary": "Source - nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-27623" }, { "category": "external", "summary": "Source raw - nvd", "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-27623" }, { "category": "external", "summary": "Source - redhat", "url": "https://access.redhat.com/security/cve/CVE-2026-27623" }, { "category": "external", "summary": "Source raw - redhat", "url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-27623.json" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-27623" }, { "category": "external", "summary": "Source raw - first", "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0" }, { "category": "external", "summary": "Source - osv", "url": "https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/GIT%2FCVE-2026-27623.json?alt=media" }, { "category": "external", "summary": "Source - debian", "url": "https://security-tracker.debian.org/tracker/CVE-2026-27623" }, { "category": "external", "summary": "Source - hkcert", "url": "https://www.hkcert.org/security-bulletin/valkey-products-multiple-vulnerabilities_20260225" }, { "category": "external", "summary": "Source - osv", "url": "https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/Bitnami%2FBIT-valkey-2026-27623.json?alt=media" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0" }, { "category": "external", "summary": "Source - microsoft", "url": "https://api.msrc.microsoft.com/cvrf/v3.0/cvrf/2026-Feb" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd; osv; redhat", "url": "https://github.com/valkey-io/valkey/security/advisories/GHSA-93p9-5vc7-8wgr" }, { "category": "external", "summary": "Reference - redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-27623" }, { "category": "external", "summary": "Reference - osv; redhat", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-27623" }, { "category": "external", "summary": "Reference - osv", "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27623.json" } ], "remediations": [ { "category": "mitigation", "details": "To mitigate this issue, restrict network access to Valkey deployments. Configure network firewalls or access control lists to ensure that only trusted users and systems can establish connections to the Valkey service. This will limit the exposure to malicious actors and prevent unauthorized denial of service attacks. Reloading network configurations or restarting firewall services may be required for changes to take effect.", "product_ids": [ "CSAFPID-1439319", "CSAFPID-2858634", "CSAFPID-2889545", "CSAFPID-3093047" ] } ], "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", "baseScore": 7.5, "baseSeverity": "HIGH" }, "products": [ "CSAFPID-1439319", "CSAFPID-2858634", "CSAFPID-2889545", "CSAFPID-3093047", "CSAFPID-5677455", "CSAFPID-5686899", "CSAFPID-5686900", "CSAFPID-5700153", "CSAFPID-5707847", "CSAFPID-5729828" ] } ], "title": "CVE-2026-27623" } ] }