{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-126067","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-11-10T17:07:43.283Z","datePublished":"2026-11-10T20:29:44.430Z","dateUpdated":"2026-11-13T16:00:26.328Z"},"containers":{"cna":{"title":"Action Pack: Missing SameSite attribute on session cookies from Action Pack session stores","problemTypes":[{"descriptions":[{"cweId":"CWE-352","lang":"en","description":"CWE-352: Cross-Site Request Forgery","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":3.1,"baseSeverity":"LOW","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/rails/rails/security/advisories/GHSA-gmj8-hvj3-49mw","tags":["x_refsource_CONFIRM"],"url":"https://github.com/rails/rails/security/advisories/GHSA-gmj8-hvj3-49mw"},{"name":"https://github.com/rails/rails/commit/2d9f502df941e31ce9bad0e846564f49396bed46","tags":["x_refsource_MISC"],"url":"https://github.com/rails/rails/commit/2d9f502df941e31ce9bad0e846564f49396bed46"},{"name":"https://github.com/rails/rails/commit/f2392996be723708271a8d30bfcf0edc221e53ef","tags":["x_refsource_MISC"],"url":"https://github.com/rails/rails/commit/f2392996be723708271a8d30bfcf0edc221e53ef"},{"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":"2026-11-10T20:29:44.430Z"},"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, Action Pack session stores other than ActionDispatch::Session::CookieStore (CacheStore, MemCacheStore, and third-party stores built on AbstractStore, AbstractSecureStore or the session mixins) write the session cookie without a SameSite attribute, regardless of config.action_dispatch.cookies_same_site_protection, which defaults to :lax. Only CookieStore applies the configured policy. In browsers that do not treat a cookie without the attribute as SameSite=Lax, a cross-site request could carry the session cookie, possibly leading to cross-site request forgery against actions that do not verify an authenticity token, such as those of API-only applications. Applications are affected when they use a session store other than CookieStore and do not pass same_site: to config.session_store. This issue is fixed in versions 8.1.4.1 and 8.0.5.2."}],"source":{"advisory":"GHSA-gmj8-hvj3-49mw","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-11-13T15:56:36.588222Z","id":"CVE-2026-126067","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":"2026-11-13T16:00:26.328Z"}}]}}