{"affected":[{"package":{"ecosystem":"Hex","name":"ash_authentication","purl":"pkg:hex/ash_authentication"},"ranges":[{"events":[{"introduced":"4.9.1"},{"fixed":"4.15.0"}],"type":"SEMVER"},{"events":[{"introduced":"5.0.0-rc.0"},{"fixed":"5.0.0-rc.14"}],"type":"SEMVER"}],"versions":["4.9.1","4.9.2","4.9.3","4.9.4","4.9.5","4.9.6","4.9.7","4.9.8","4.9.9","4.10.0","4.11.0","4.12.0","4.13.0","4.13.1","4.13.2","4.13.3","4.13.4","4.13.5","4.13.6","4.13.7","4.14.0","4.14.1","4.14.2","5.0.0-rc.0","5.0.0-rc.1","5.0.0-rc.2","5.0.0-rc.3","5.0.0-rc.4","5.0.0-rc.5","5.0.0-rc.6","5.0.0-rc.7","5.0.0-rc.8","5.0.0-rc.9","5.0.0-rc.10","5.0.0-rc.11","5.0.0-rc.12","5.0.0-rc.13"]},{"package":{"ecosystem":"Hex","name":"ash_authentication_phoenix","purl":"pkg:hex/ash_authentication_phoenix"},"ranges":[{"events":[{"introduced":"2.10.0"},{"fixed":"2.17.4"}],"type":"SEMVER"},{"events":[{"introduced":"3.0.0-rc.0"},{"fixed":"3.0.0-rc.11"}],"type":"SEMVER"}],"versions":["2.10.0","2.10.1","2.10.2","2.10.3","2.10.4","2.10.5","2.11.0","2.12.0","2.12.1","2.12.2","2.13.0","2.13.1","2.14.0","2.14.1","2.15.0","2.16.0","2.17.0","2.17.1","2.17.2","2.17.3","3.0.0-rc.0","3.0.0-rc.1","3.0.0-rc.2","3.0.0-rc.3","3.0.0-rc.4","3.0.0-rc.6","3.0.0-rc.7","3.0.0-rc.8","3.0.0-rc.9","3.0.0-rc.10"]},{"ranges":[{"events":[{"introduced":"fcaeb73f76f8f2e9aef8bf637690d2a20dd97596"},{"fixed":"a3f49f758f013d2ff086dd9c5ef2d94e921711b4"},{"fixed":"e28e911caa9728d76329afdb0fb26742ffe4eeef"}],"repo":"https://github.com/team-alembic/ash_authentication","type":"GIT"}]},{"ranges":[{"events":[{"introduced":"a3253fb4fc7145aeb403537af1c24d3a8d51ffb1"},{"introduced":"0135217e34e621dac79ae3d9559aeee49304b0aa"},{"fixed":"f7ab005a2aac09707a25521653c94893d328cc52"},{"fixed":"0135217e34e621dac79ae3d9559aeee49304b0aa"}],"repo":"https://github.com/team-alembic/ash_authentication_phoenix","type":"GIT"}]}],"aliases":["GHSA-m6x4-4gvp-xwjr","CVE-2026-86533"],"credits":[{"name":"Peter Ullrich","type":"REPORTER"},{"name":"Jonatan Männchen / EEF","type":"ANALYST"},{"name":"James Harton","type":"REMEDIATION_DEVELOPER"}],"database_specific":{"capec_ids":["CAPEC-60"],"cpe_ids":["cpe:2.3:a:team-alembic:ash_authentication:*:*:*:*:*:*:*:*","cpe:2.3:a:team-alembic:ash_authentication_phoenix:*:*:*:*:*:*:*:*"],"cwe_ids":["CWE-613"]},"details":"## Summary\n\nInsufficient Session Expiration vulnerability in team-alembic AshAuthentication and AshAuthentication Phoenix allows a revoked session to remain fully authenticated.\n\nA resource configured with `session_identifier :jti` and `require_token_presence_for_authentication?` disabled stores its session value as `<jti>:<subject>`. The `jti` is there so that signing out can revoke that one session. Neither reader consults it: `AshAuthentication.Plug.Helpers.authenticate_resource_from_session/4` and `AshAuthentication.Phoenix.LiveSession.on_mount/4` both split the value with `split_identifier/2`, discard the `jti` and pass the bare subject to `AshAuthentication.subject_to_user/3`, which reloads the record. The token-presence branch of each function does check its token, calling `AshAuthentication.TokenResource.Actions.get_token/3` with the `jti` and the purpose `user`. Because the revocation record is never read, neither its revoked state nor its expiry constrains the session, so a session captured before sign-out keeps working.\n\nThis issue affects ash_authentication: from 4.9.1 before 4.15.0 and from 5.0.0-rc.0 before 5.0.0-rc.14; ash_authentication_phoenix: from 2.10.0 before 2.17.4 and from 3.0.0-rc.0 before 3.0.0-rc.11.","id":"EEF-CVE-2026-86533","modified":"2026-09-17T14:05:29.839553Z","published":"2026-09-17T13:09:37.963Z","references":[{"type":"ADVISORY","url":"https://github.com/team-alembic/ash_authentication_phoenix/security/advisories/GHSA-m6x4-4gvp-xwjr"},{"type":"WEB","url":"https://cna.erlef.org/cves/CVE-2026-86533.html"},{"type":"ADVISORY","url":"https://github.com/team-alembic/ash_authentication/security/advisories/GHSA-w374-hvrx-66hg"},{"type":"WEB","url":"https://github.com/team-alembic/ash_authentication/commit/fcaeb73f76f8f2e9aef8bf637690d2a20dd97596"},{"type":"FIX","url":"https://github.com/team-alembic/ash_authentication/commit/a3f49f758f013d2ff086dd9c5ef2d94e921711b4"},{"type":"FIX","url":"https://github.com/team-alembic/ash_authentication/commit/e28e911caa9728d76329afdb0fb26742ffe4eeef"},{"type":"WEB","url":"https://github.com/team-alembic/ash_authentication_phoenix/commit/a3253fb4fc7145aeb403537af1c24d3a8d51ffb1"},{"type":"WEB","url":"https://github.com/team-alembic/ash_authentication_phoenix/commit/0135217e34e621dac79ae3d9559aeee49304b0aa"},{"type":"FIX","url":"https://github.com/team-alembic/ash_authentication_phoenix/commit/f7ab005a2aac09707a25521653c94893d328cc52"},{"type":"PACKAGE","url":"https://hex.pm/packages/ash_authentication"},{"type":"PACKAGE","url":"https://hex.pm/packages/ash_authentication_phoenix"}],"related":[],"schema_version":"1.7.3","severity":[{"score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","type":"CVSS_V4"}],"summary":"Revoked session accepted because the session jti is never checked in AshAuthentication and AshAuthentication Phoenix","upstream":[]}