{"id":"CVE-2026-126067","published":"2026-11-10T21:19:24.653","lastModified":"2026-11-10T21:19:24.653","description":"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.","cvssScore":3.1,"cvssSeverity":"LOW","cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N","cwes":["CWE-352"],"vendors":[],"products":[],"references":[{"url":"https://github.com/rails/rails/commit/2d9f502df941e31ce9bad0e846564f49396bed46","tags":[]},{"url":"https://github.com/rails/rails/commit/f2392996be723708271a8d30bfcf0edc221e53ef","tags":[]},{"url":"https://github.com/rails/rails/releases/tag/v8.0.5.2","tags":[]},{"url":"https://github.com/rails/rails/releases/tag/v8.1.4.1","tags":[]},{"url":"https://github.com/rails/rails/security/advisories/GHSA-gmj8-hvj3-49mw","tags":[]}],"exploitRefs":[{"url":"https://github.com/rails/rails/commit/2d9f502df941e31ce9bad0e846564f49396bed46","tags":[]},{"url":"https://github.com/rails/rails/commit/f2392996be723708271a8d30bfcf0edc221e53ef","tags":[]},{"url":"https://github.com/rails/rails/releases/tag/v8.0.5.2","tags":[]},{"url":"https://github.com/rails/rails/releases/tag/v8.1.4.1","tags":[]},{"url":"https://github.com/rails/rails/security/advisories/GHSA-gmj8-hvj3-49mw","tags":[]}],"hasPoc":true,"ai":null}