{"affected":[{"package":{"ecosystem":"Hex","name":"ash_authentication","purl":"pkg:hex/ash_authentication"},"ranges":[{"events":[{"introduced":"4.3.8"},{"fixed":"4.15.0"}],"type":"SEMVER"},{"events":[{"introduced":"5.0.0-rc.0"},{"fixed":"5.0.0-rc.14"}],"type":"SEMVER"}],"versions":["4.3.8","4.3.9","4.3.10","4.3.11","4.3.12","4.4.0","4.4.1","4.4.2","4.4.3","4.4.4","4.4.5","4.4.6","4.4.7","4.4.8","4.4.9","4.5.0","4.5.1","4.5.2","4.5.3","4.5.4","4.5.5","4.5.6","4.6.0","4.6.1","4.6.2","4.6.3","4.6.4","4.7.0","4.7.1","4.7.2","4.7.3","4.7.4","4.7.5","4.7.6","4.8.0","4.8.1","4.8.2","4.8.3","4.8.5","4.8.6","4.8.7","4.9.0","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"]},{"ranges":[{"events":[{"introduced":"7d37bc6e4df6697b5813d2f373f0fdb08f813f98"},{"fixed":"17f4c25a372d1778c9cc457759e6357570d83711"},{"fixed":"1076639a9d40213088d110c79ba6735b8cc85b16"}],"repo":"https://github.com/team-alembic/ash_authentication","type":"GIT"}]}],"aliases":["GHSA-fc47-6pgw-wh22","CVE-2026-85500"],"credits":[{"name":"Peter Ullrich","type":"REPORTER"},{"name":"Jonatan Männchen / EEF","type":"ANALYST"},{"name":"James Harton","type":"REMEDIATION_DEVELOPER"}],"database_specific":{"capec_ids":["CAPEC-115"],"cpe_ids":["cpe:2.3:a:team-alembic:ash_authentication:*:*:*:*:*:*:*:*"],"cwe_ids":["CWE-305"]},"details":"## Summary\n\nAuthentication Bypass by Primary Weakness vulnerability in team-alembic AshAuthentication allows an unconfirmed user to obtain a session, defeating a mandatory email confirmation requirement.\n\n`AshAuthentication.Strategy.Password.Actions.check_user/2` decides whether the attribute named by `require_confirmed_with` is set using a bare `is_nil(Map.get(user, value))`. When that attribute is not selected on the loaded record `Map.get/2` returns `%Ash.NotLoaded{}`, and when a field policy denies it for the current actor it returns `%Ash.ForbiddenField{}`. Neither is `nil`, so the rejection branch is skipped and sign-i\n\n`require_confirmed_with` is enforced in two places, and neither holds in every\nconfiguration. `sign_in_with_token` and `register` are checked only inside\n`AshAuthentication.Strategy.Password.Actions`, not on the action itself, so any caller\nthat invokes the action directly skips the check. An API layer such as `AshGraphql` or\n`AshJsonApi` invokes the action directly, so this applies to the default configuration.\nWhere a check does run it compares the confirmation attribute against `nil`. That\nattribute holds `%Ash.NotLoaded{}` or `%Ash.ForbiddenField{}` when it sets\n`select_by_default?: false`, when an API layer narrows the read's `select`, or when a\nfield policy hides it from the sign-in actor. Neither struct is `nil`, so those\nconfigurations read every user as confirmed.\n\nThis issue affects ash_authentication: from 4.3.8 before 4.15.0 and from 5.0.0-rc.0 before 5.0.0-rc.14.","id":"EEF-CVE-2026-85500","modified":"2026-09-17T13:09:43.448771Z","published":"2026-09-17T13:09:43.000Z","references":[{"type":"ADVISORY","url":"https://github.com/team-alembic/ash_authentication/security/advisories/GHSA-fc47-6pgw-wh22"},{"type":"WEB","url":"https://cna.erlef.org/cves/CVE-2026-85500.html"},{"type":"WEB","url":"https://github.com/team-alembic/ash_authentication/commit/7d37bc6e4df6697b5813d2f373f0fdb08f813f98"},{"type":"FIX","url":"https://github.com/team-alembic/ash_authentication/commit/17f4c25a372d1778c9cc457759e6357570d83711"},{"type":"FIX","url":"https://github.com/team-alembic/ash_authentication/commit/1076639a9d40213088d110c79ba6735b8cc85b16"},{"type":"PACKAGE","url":"https://hex.pm/packages/ash_authentication"}],"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":"`require_confirmed_with` is not enforced on the action and fails open on an unreadable attribute in AshAuthentication","upstream":[]}