{"id":"CVE-2026-27623","aliases":["ALPINE-CVE-2026-27623","BELL-CVE-2026-27623","BIT-valkey-2026-27623","EUVD-2026-7509","GHSA-93p9-5vc7-8wgr","UBUNTU-CVE-2026-27623","openSUSE-SU-2026:10266-1"],"status":"published","title":"Valkey has Pre-Authentication DOS from malformed RESP request","description":"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.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00405,"percentile":0.35094,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-20","CWE-617"],"published":"2026-02-23T19:43:45Z","modified":"2026-10-28T02:30:45Z","fixes":[{"ecosystem":"Alpine:v3.23","package":"valkey","fixed_in":["9.0.3-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.24","package":"valkey","fixed_in":["9.0.3-r0"],"sources":["osv"]},{"ecosystem":"Bitnami","package":"valkey","fixed_in":["9.0.3"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Alpine:v3.23","package":"valkey","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"9.0.0"},{"fixed":"9.0.3-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.24","package":"valkey","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"9.0.0"},{"fixed":"9.0.3-r0"}]}]},{"source":"osv","ecosystem":"Bitnami","package":"valkey","ranges":[{"type":"SEMVER","events":[{"introduced":"9.0.0"},{"fixed":"9.0.3"}]}]},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"valkey","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"9.0.3-1.1"}]}],"bundled":3}],"products":[{"vendor":"lfprojects","product":"valkey"},{"vendor":"red hat","product":"red hat enterprise linux 10"},{"vendor":"red hat","product":"red hat enterprise linux 9"},{"vendor":"valkey-io","product":"valkey"}],"references":[{"url":"https://github.com/valkey-io/valkey/security/advisories/GHSA-93p9-5vc7-8wgr","tags":["x_refsource_CONFIRM","Vendor Advisory","advisory","report"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-27623","tags":["vdb-entry","x_refsource_REDHAT","web","advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2442021","tags":["issue-tracking","x_refsource_REDHAT","web","report"]},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-27623.json","tags":["x_sadp-csaf-vex","web"]},{"url":"https://security.alpinelinux.org/vuln/CVE-2026-27623","tags":["advisory"]},{"url":"https://docs.bell-sw.com/security/cves/CVE-2026-27623","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-27623","tags":["web","advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27623.json","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-27623","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-27623","tags":["report"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2025-67733","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-21863","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-27623","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2026-27623","title":"Valkey has Pre-Authentication DOS from malformed RESP request","description":"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.","status":"published","published":"2026-02-23T19:43:45.736Z","modified":"2026-07-15T01:13:50.055Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"adp"}],"cwes":["CWE-20","CWE-617"],"updated_at":"2026-11-02T14:19:49.199185Z"}],"euvd":[{"id":"EUVD-2026-7509","description":"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.","status":"published","published":"2026-02-23T19:43:45Z","modified":"2026-07-15T01:13:50Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T18:19:55.842782Z"}],"nvd":[{"id":"CVE-2026-27623","description":"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.","status":"published","published":"2026-02-23T20:28:55.217Z","modified":"2026-07-15T02:19:08.967Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-20","CWE-617"],"updated_at":"2026-11-02T14:12:06.63895Z"}],"osv":[{"id":"ALPINE-CVE-2026-27623","description":"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.","status":"published","published":"2026-02-23T20:28:55.217Z","modified":"2026-10-01T02:17:49.222049797Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:27:50.269992Z"},{"id":"BELL-CVE-2026-27623","title":"CVE-2026-27623 does not affect BellSoft software","status":"withdrawn","published":"2026-02-26T06:09:25.503249Z","modified":"2026-04-08T07:15:28.023076Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:28:23.315185Z"},{"id":"CVE-2026-27623","title":"Valkey has Pre-Authentication DOS from malformed RESP request","description":"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.","status":"published","published":"2026-02-23T19:43:45.736Z","modified":"2026-10-28T02:30:45.16977095Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T15:45:00.180685Z"},{"id":"UBUNTU-CVE-2026-27623","description":"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.","status":"withdrawn","published":"2026-02-23T20:28:00Z","modified":"2026-03-19T08:32:01.406383Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T16:56:08.726452Z"},{"id":"BIT-valkey-2026-27623","title":"Valkey has Pre-Authentication DOS from malformed RESP request","description":"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.","status":"published","published":"2026-02-26T08:53:22.415Z","modified":"2026-09-08T08:48:21.160700786Z","updated_at":"2026-11-02T15:28:36.104787Z"},{"id":"openSUSE-SU-2026:10266-1","title":"valkey-9.0.3-1.1 on GA media","description":"These are all security issues fixed in the valkey-9.0.3-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2026-02-26T00:00:00Z","modified":"2026-03-23T04:54:37.941381Z","updated_at":"2026-11-02T16:58:38.101535Z"}]}}