Description
Insufficient Session Expiration vulnerability in team-alembic AshAuthentication and AshAuthentication Phoenix allows a revoked session to remain fully authenticated. A 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. This 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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
team-alembic ash_authentication
Default version status: unaffected
4.9.1 to < 4.15.0affected5.0.0-rc.0 to < 5.0.0-rc.14affected
pkg:hex/ash_authenticationteam-alembic ash_authentication
Default version status: unaffected
fcaeb73f76f8f2e9aef8bf637690d2a20dd97596 to < *affected
pkg:github/team-alembic/ash_authenticationteam-alembic ash_authentication_phoenix
Default version status: unaffected
2.10.0 to < 2.17.4affected3.0.0-rc.0 to < 3.0.0-rc.11affected
pkg:hex/ash_authentication_phoenixteam-alembic ash_authentication_phoenix
Default version status: unaffected
a3253fb4fc7145aeb403537af1c24d3a8d51ffb1 to < *affected0135217e34e621dac79ae3d9559aeee49304b0aa to < *affected
pkg:github/team-alembic/ash_authentication_phoenixReferences
- https://github.com/team-alembic/ash_authentication_phoenix/security/advisories/GHSA-m6x4-4gvp-xwjr ↗
- https://cna.erlef.org/cves/CVE-2026-86533.html ↗
- https://osv.dev/vulnerability/EEF-CVE-2026-86533 ↗
- https://github.com/team-alembic/ash_authentication/security/advisories/GHSA-w374-hvrx-66hg ↗
- https://github.com/team-alembic/ash_authentication/commit/fcaeb73f76f8f2e9aef8bf637690d2a20dd97596 ↗
- https://github.com/team-alembic/ash_authentication/commit/a3f49f758f013d2ff086dd9c5ef2d94e921711b4 ↗
- https://github.com/team-alembic/ash_authentication/commit/e28e911caa9728d76329afdb0fb26742ffe4eeef ↗
- https://github.com/team-alembic/ash_authentication_phoenix/commit/a3253fb4fc7145aeb403537af1c24d3a8d51ffb1 ↗
- https://github.com/team-alembic/ash_authentication_phoenix/commit/0135217e34e621dac79ae3d9559aeee49304b0aa ↗
- https://github.com/team-alembic/ash_authentication_phoenix/commit/f7ab005a2aac09707a25521653c94893d328cc52 ↗