{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-126076","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-11-10T17:07:43.285Z","datePublished":"2026-11-10T20:57:07.582Z","dateUpdated":"2026-11-12T19:05:13.367Z"},"containers":{"cna":{"title":"Action Pack: Possible restoration of destroyed sessions in Action Dispatch CacheStore","problemTypes":[{"descriptions":[{"cweId":"CWE-613","lang":"en","description":"CWE-613: Insufficient Session Expiration","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":4.2,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/rails/rails/security/advisories/GHSA-2586-8ghr-69fj","tags":["x_refsource_CONFIRM"],"url":"https://github.com/rails/rails/security/advisories/GHSA-2586-8ghr-69fj"},{"name":"https://github.com/rails/rails/commit/5bb5ec66ed8faaf590ffe1222d7a5eb6e9d050f5","tags":["x_refsource_MISC"],"url":"https://github.com/rails/rails/commit/5bb5ec66ed8faaf590ffe1222d7a5eb6e9d050f5"},{"name":"https://github.com/rails/rails/commit/d479192cf88a8b30a335a8bc25188a2d8e0f8d9f","tags":["x_refsource_MISC"],"url":"https://github.com/rails/rails/commit/d479192cf88a8b30a335a8bc25188a2d8e0f8d9f"},{"name":"https://github.com/rails/rails/releases/tag/v8.0.5.2","tags":["x_refsource_MISC"],"url":"https://github.com/rails/rails/releases/tag/v8.0.5.2"},{"name":"https://github.com/rails/rails/releases/tag/v8.1.4.1","tags":["x_refsource_MISC"],"url":"https://github.com/rails/rails/releases/tag/v8.1.4.1"}],"affected":[{"vendor":"rails","product":"rails","versions":[{"version":">= 8.1, < 8.1.4.1","status":"affected"},{"version":"< 8.0.5.2","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-11-10T20:57:07.582Z"},"descriptions":[{"lang":"en","value":"Action Pack is a framework for handling and responding to web requests. Prior to 8.1.4.1 and 8.0.5.2, ActionDispatch::Session::CacheStore writes a session back to the cache at the end of each request that loaded it, without checking that the session's cache entry still exists. When a concurrent request destroys the session, through reset_session on logout or by deleting its cache entry on the server, a request that loaded the session earlier and finishes later restores it under its original session ID. Logout and server-side revocation could therefore fail to end a session, and an attacker who holds a stolen session cookie could keep that session valid across the victim's logout. Applications that use config.session_store :cache_store are affected, with any cache backend. ActionDispatch::Session::CookieStore is not affected, nor is ActionDispatch::Session::MemCacheStore with Dalli 4.0.0 or later, whose session store does not write back a session that was deleted. This issue is fixed in versions 8.1.4.1 and 8.0.5.2."}],"source":{"advisory":"GHSA-2586-8ghr-69fj","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-11-12T19:04:57.165186Z","id":"CVE-2026-126076","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-11-12T19:05:13.367Z"}}]}}