{"id":"CVE-2026-56684","state":"PUBLISHED","title":"Valkey: TLS pending-data processing use-after-free may allow remote code execution","description":"Valkey is a distributed key-value database. Prior to 7.2.14, 8.0.10, 8.1.9, 9.0.5, and 9.1.1, Valkey's tlsProcessPendingData function iterates pending_list while an authenticated client can trigger CLIENT KILL, causing connTLSClose to delete the iterator's cached next node and producing a use-after-free that can crash the server or potentially allow remote code execution when TLS is enabled. This issue is fixed in versions 7.2.14, 8.0.10, 8.1.9, 9.0.5, and 9.1.1.","publishedAt":"2026-08-18T14:19:51.047Z","updatedAt":"2026-08-19T03:56:13.565Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["valkey-io valkey"],"affected":[{"vendor":"valkey-io","product":"valkey","versions":[{"version":"< 7.2.14","status":"affected"},{"version":">= 8.0.0, < 8.0.10","status":"affected"},{"version":">= 8.1.0, < 8.1.9","status":"affected"},{"version":">= 9.0.0, < 9.0.5","status":"affected"},{"version":">= 9.1.0, < 9.1.1","status":"affected"}]}],"references":["https://github.com/valkey-io/valkey/security/advisories/GHSA-53mc-f3m3-99vh","https://github.com/valkey-io/valkey/pull/4234","https://github.com/valkey-io/valkey/commit/7cd5bcb7575d750ec2de618db80da58680a10fe3","https://github.com/valkey-io/valkey/releases/tag/7.2.14","https://github.com/valkey-io/valkey/releases/tag/8.0.10","https://github.com/valkey-io/valkey/releases/tag/8.1.9","https://github.com/valkey-io/valkey/releases/tag/9.0.5","https://github.com/valkey-io/valkey/releases/tag/9.1.1"],"weaknesses":["CWE-416"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/56xxx/CVE-2026-56684.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-56684","state":"PUBLISHED","datePublished":"2026-08-18T14:19:51.047Z","dateUpdated":"2026-08-19T03:56:13.565Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-22T16:39:01.044Z"},"containers":{"cna":{"title":"Valkey: TLS pending-data processing use-after-free may allow remote code execution","descriptions":[{"lang":"en","value":"Valkey is a distributed key-value database. Prior to 7.2.14, 8.0.10, 8.1.9, 9.0.5, and 9.1.1, Valkey's tlsProcessPendingData function iterates pending_list while an authenticated client can trigger CLIENT KILL, causing connTLSClose to delete the iterator's cached next node and producing a use-after-free that can crash the server or potentially allow remote code execution when TLS is enabled. This issue is fixed in versions 7.2.14, 8.0.10, 8.1.9, 9.0.5, and 9.1.1."}],"affected":[{"vendor":"valkey-io","product":"valkey","versions":[{"version":"< 7.2.14","status":"affected"},{"version":">= 8.0.0, < 8.0.10","status":"affected"},{"version":">= 8.1.0, < 8.1.9","status":"affected"},{"version":">= 9.0.0, < 9.0.5","status":"affected"},{"version":">= 9.1.0, < 9.1.1","status":"affected"}]}],"references":[{"url":"https://github.com/valkey-io/valkey/security/advisories/GHSA-53mc-f3m3-99vh","name":"https://github.com/valkey-io/valkey/security/advisories/GHSA-53mc-f3m3-99vh","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/valkey-io/valkey/pull/4234","name":"https://github.com/valkey-io/valkey/pull/4234","tags":["x_refsource_MISC"]},{"url":"https://github.com/valkey-io/valkey/commit/7cd5bcb7575d750ec2de618db80da58680a10fe3","name":"https://github.com/valkey-io/valkey/commit/7cd5bcb7575d750ec2de618db80da58680a10fe3","tags":["x_refsource_MISC"]},{"url":"https://github.com/valkey-io/valkey/releases/tag/7.2.14","name":"https://github.com/valkey-io/valkey/releases/tag/7.2.14","tags":["x_refsource_MISC"]},{"url":"https://github.com/valkey-io/valkey/releases/tag/8.0.10","name":"https://github.com/valkey-io/valkey/releases/tag/8.0.10","tags":["x_refsource_MISC"]},{"url":"https://github.com/valkey-io/valkey/releases/tag/8.1.9","name":"https://github.com/valkey-io/valkey/releases/tag/8.1.9","tags":["x_refsource_MISC"]},{"url":"https://github.com/valkey-io/valkey/releases/tag/9.0.5","name":"https://github.com/valkey-io/valkey/releases/tag/9.0.5","tags":["x_refsource_MISC"]},{"url":"https://github.com/valkey-io/valkey/releases/tag/9.1.1","name":"https://github.com/valkey-io/valkey/releases/tag/9.1.1","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-416","lang":"en","description":"CWE-416: Use After Free","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-08-18T14:19:51.047Z"},"source":{"advisory":"GHSA-53mc-f3m3-99vh","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-18T00:00:00+00:00","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3","id":"CVE-2026-56684"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-19T03:56:13.565Z"}}]}}}