{"attribution":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","cve":{"id":"CVE-2026-126076","sourceIdentifier":"security-advisories@github.com","published":"2026-11-10T21:19:26.040","lastModified":"2026-11-10T21:19:26.040","vulnStatus":"Received","cveTags":[],"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."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"rails","product":"rails","versions":[{"version":"\u003e= 8.1, \u003c 8.1.4.1","status":"affected"},{"version":"\u003c 8.0.5.2","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N","baseScore":4.2,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"NONE"},"exploitabilityScore":1.6,"impactScore":2.5}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Primary","description":[{"lang":"en","value":"CWE-613"}]}],"references":[{"url":"https://github.com/rails/rails/commit/5bb5ec66ed8faaf590ffe1222d7a5eb6e9d050f5","source":"security-advisories@github.com"},{"url":"https://github.com/rails/rails/commit/d479192cf88a8b30a335a8bc25188a2d8e0f8d9f","source":"security-advisories@github.com"},{"url":"https://github.com/rails/rails/releases/tag/v8.0.5.2","source":"security-advisories@github.com"},{"url":"https://github.com/rails/rails/releases/tag/v8.1.4.1","source":"security-advisories@github.com"},{"url":"https://github.com/rails/rails/security/advisories/GHSA-2586-8ghr-69fj","source":"security-advisories@github.com"}]}}