CVE-2026-86533 (GCVE-0-2026-86533)
Vulnerability from cvelistv5
Published
2026-09-17 13:09
Modified
2026-09-17 18:17
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-613 - Insufficient Session Expiration
Summary
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.
References
Impacted products
| Vendor | Product | Version | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| team-alembic | ash_authentication |
Version: 4.9.1 ≤ Version: 5.0.0-rc.0 ≤ cpe:2.3:a:team-alembic:ash_authentication:*:*:*:*:*:*:*:* |
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\"value\": \"GENERAL\"}]}], \"affected\": [{\"cpes\": [\"cpe:2.3:a:team-alembic:ash_authentication:*:*:*:*:*:*:*:*\"], \"repo\": \"https://github.com/team-alembic/ash_authentication\", \"vendor\": \"team-alembic\", \"modules\": [\"\u0027Elixir.AshAuthentication.Plug.Helpers\u0027\"], \"product\": \"ash_authentication\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.9.1\", \"lessThan\": \"4.15.0\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"5.0.0-rc.0\", \"lessThan\": \"5.0.0-rc.14\", \"versionType\": \"semver\"}], \"packageURL\": \"pkg:hex/ash_authentication\", \"packageName\": \"ash_authentication\", \"programFiles\": [\"lib/ash_authentication/plug/helpers.ex\"], \"collectionURL\": \"https://repo.hex.pm\", \"defaultStatus\": \"unaffected\", \"programRoutines\": [{\"name\": \"\u0027Elixir.AshAuthentication.Plug.Helpers\u0027:retrieve_from_session/3\"}, {\"name\": \"\u0027Elixir.AshAuthentication.Plug.Helpers\u0027:authenticate_resource_from_session/4\"}]}, {\"cpes\": [\"cpe:2.3:a:team-alembic:ash_authentication:*:*:*:*:*:*:*:*\"], \"repo\": \"https://github.com/team-alembic/ash_authentication\", \"vendor\": \"team-alembic\", \"modules\": [\"\u0027Elixir.AshAuthentication.Plug.Helpers\u0027\"], \"product\": \"ash_authentication\", \"versions\": [{\"status\": \"affected\", \"changes\": [{\"at\": \"a3f49f758f013d2ff086dd9c5ef2d94e921711b4\", \"status\": \"unaffected\"}, {\"at\": \"e28e911caa9728d76329afdb0fb26742ffe4eeef\", \"status\": \"unaffected\"}], \"version\": \"fcaeb73f76f8f2e9aef8bf637690d2a20dd97596\", \"lessThan\": \"*\", \"versionType\": \"git\"}], \"packageURL\": \"pkg:github/team-alembic/ash_authentication\", \"packageName\": \"team-alembic/ash_authentication\", \"programFiles\": [\"lib/ash_authentication/plug/helpers.ex\"], \"collectionURL\": \"https://github.com\", \"defaultStatus\": \"unaffected\", \"programRoutines\": [{\"name\": \"\u0027Elixir.AshAuthentication.Plug.Helpers\u0027:retrieve_from_session/3\"}, {\"name\": \"\u0027Elixir.AshAuthentication.Plug.Helpers\u0027:authenticate_resource_from_session/4\"}]}, {\"cpes\": [\"cpe:2.3:a:team-alembic:ash_authentication_phoenix:*:*:*:*:*:*:*:*\"], \"repo\": \"https://github.com/team-alembic/ash_authentication_phoenix\", \"vendor\": \"team-alembic\", \"modules\": [\"\u0027Elixir.AshAuthentication.Phoenix.LiveSession\u0027\"], \"product\": \"ash_authentication_phoenix\", \"versions\": [{\"status\": \"affected\", \"version\": \"2.10.0\", \"lessThan\": \"2.17.4\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"3.0.0-rc.0\", \"lessThan\": \"3.0.0-rc.11\", \"versionType\": \"semver\"}], \"packageURL\": \"pkg:hex/ash_authentication_phoenix\", \"packageName\": \"ash_authentication_phoenix\", \"programFiles\": [\"lib/ash_authentication_phoenix/live_session.ex\"], \"collectionURL\": \"https://repo.hex.pm\", \"defaultStatus\": \"unaffected\", \"programRoutines\": [{\"name\": \"\u0027Elixir.AshAuthentication.Phoenix.LiveSession\u0027:on_mount/4\"}]}, {\"cpes\": [\"cpe:2.3:a:team-alembic:ash_authentication_phoenix:*:*:*:*:*:*:*:*\"], \"repo\": \"https://github.com/team-alembic/ash_authentication_phoenix\", \"vendor\": \"team-alembic\", \"modules\": [\"\u0027Elixir.AshAuthentication.Phoenix.LiveSession\u0027\"], \"product\": \"ash_authentication_phoenix\", \"versions\": [{\"status\": \"affected\", \"changes\": [{\"at\": \"f7ab005a2aac09707a25521653c94893d328cc52\", \"status\": \"unaffected\"}, {\"at\": \"0135217e34e621dac79ae3d9559aeee49304b0aa\", \"status\": \"unaffected\"}], \"version\": \"a3253fb4fc7145aeb403537af1c24d3a8d51ffb1\", \"lessThan\": \"*\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"changes\": [{\"at\": \"f7ab005a2aac09707a25521653c94893d328cc52\", \"status\": \"unaffected\"}, {\"at\": \"0135217e34e621dac79ae3d9559aeee49304b0aa\", \"status\": \"unaffected\"}], \"version\": \"0135217e34e621dac79ae3d9559aeee49304b0aa\", \"lessThan\": \"*\", \"versionType\": \"git\"}], \"packageURL\": \"pkg:github/team-alembic/ash_authentication_phoenix\", \"packageName\": \"team-alembic/ash_authentication_phoenix\", \"programFiles\": [\"lib/ash_authentication_phoenix/live_session.ex\"], \"collectionURL\": \"https://github.com\", \"defaultStatus\": \"unaffected\", \"programRoutines\": [{\"name\": \"\u0027Elixir.AshAuthentication.Phoenix.LiveSession\u0027:on_mount/4\"}]}], \"datePublic\": \"2026-09-17T13:09:38.000Z\", \"references\": [{\"url\": \"https://github.com/team-alembic/ash_authentication_phoenix/security/advisories/GHSA-m6x4-4gvp-xwjr\", \"tags\": [\"vendor-advisory\", \"related\"]}, {\"url\": \"https://cna.erlef.org/cves/CVE-2026-86533.html\", \"name\": \"EEF CNA record for CVE-2026-86533\", \"tags\": [\"related\"]}, {\"url\": \"https://osv.dev/vulnerability/EEF-CVE-2026-86533\", \"name\": \"OSV record EEF-CVE-2026-86533\", \"tags\": [\"related\"]}, {\"url\": \"https://github.com/team-alembic/ash_authentication/security/advisories/GHSA-w374-hvrx-66hg\", \"tags\": [\"related\", \"vendor-advisory\"]}, {\"url\": \"https://github.com/team-alembic/ash_authentication/commit/fcaeb73f76f8f2e9aef8bf637690d2a20dd97596\", \"name\": \"Introducing commit fcaeb73 in team-alembic/ash_authentication\", \"tags\": [\"related\"]}, {\"url\": \"https://github.com/team-alembic/ash_authentication/commit/a3f49f758f013d2ff086dd9c5ef2d94e921711b4\", \"name\": \"Fix commit a3f49f7 in team-alembic/ash_authentication\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/team-alembic/ash_authentication/commit/e28e911caa9728d76329afdb0fb26742ffe4eeef\", \"name\": \"Fix commit e28e911 in team-alembic/ash_authentication\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/team-alembic/ash_authentication_phoenix/commit/a3253fb4fc7145aeb403537af1c24d3a8d51ffb1\", \"name\": \"Introducing commit a3253fb in team-alembic/ash_authentication_phoenix\", \"tags\": [\"related\"]}, {\"url\": \"https://github.com/team-alembic/ash_authentication_phoenix/commit/0135217e34e621dac79ae3d9559aeee49304b0aa\", \"name\": \"Introducing commit 0135217 in team-alembic/ash_authentication_phoenix\", \"tags\": [\"related\"]}, {\"url\": \"https://github.com/team-alembic/ash_authentication_phoenix/commit/f7ab005a2aac09707a25521653c94893d328cc52\", \"name\": \"Fix commit f7ab005 in team-alembic/ash_authentication_phoenix\", \"tags\": [\"patch\"]}], \"dateAssigned\": \"2026-09-11T18:52:39.000Z\", \"descriptions\": [{\"lang\": \"en\", \"value\": \"Insufficient 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 \u003cjti\u003e:\u003csubject\u003e. 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.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eInsufficient Session Expiration vulnerability in team-alembic AshAuthentication and AshAuthentication Phoenix allows a revoked session to remain fully authenticated.\u003c/p\u003e\\n\u003cp\u003eA resource configured with \u003ccode\u003esession_identifier :jti\u003c/code\u003e and \u003ccode\u003erequire_token_presence_for_authentication?\u003c/code\u003e disabled stores its session value as \u003ccode\u003e\u0026lt;jti\u0026gt;:\u0026lt;subject\u0026gt;\u003c/code\u003e. The \u003ccode\u003ejti\u003c/code\u003e is there so that signing out can revoke that one session. Neither reader consults it: \u003ccode\u003eAshAuthentication.Plug.Helpers.authenticate_resource_from_session/4\u003c/code\u003e and \u003ccode\u003eAshAuthentication.Phoenix.LiveSession.on_mount/4\u003c/code\u003e both split the value with \u003ccode\u003esplit_identifier/2\u003c/code\u003e, discard the \u003ccode\u003ejti\u003c/code\u003e and pass the bare subject to \u003ccode\u003eAshAuthentication.subject_to_user/3\u003c/code\u003e, which reloads the record. The token-presence branch of each function does check its token, calling \u003ccode\u003eAshAuthentication.TokenResource.Actions.get_token/3\u003c/code\u003e with the \u003ccode\u003ejti\u003c/code\u003e and the purpose \u003ccode\u003euser\u003c/code\u003e. 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.\u003c/p\u003e\\n\u003cp\u003eThis 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.\u003c/p\u003e\", \"base64\": false}, {\"type\": \"text/markdown\", \"value\": \"Insufficient 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 `\u003cjti\u003e:\u003csubject\u003e`. 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.\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-613\", \"description\": \"CWE-613 Insufficient Session Expiration\"}]}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:a:team-alembic:ash_authentication:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.15.0\", \"versionStartIncluding\": \"4.9.1\"}, {\"criteria\": \"cpe:2.3:a:team-alembic:ash_authentication:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.0.0-rc.14\", \"versionStartIncluding\": \"5.0.0-rc.0\"}, {\"criteria\": \"cpe:2.3:a:team-alembic:ash_authentication_phoenix:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"2.17.4\", \"versionStartIncluding\": \"2.10.0\"}, {\"criteria\": \"cpe:2.3:a:team-alembic:ash_authentication_phoenix:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"3.0.0-rc.11\", \"versionStartIncluding\": \"3.0.0-rc.0\"}], \"operator\": \"OR\"}], \"operator\": \"AND\"}], \"providerMetadata\": {\"orgId\": \"6b3ad84c-e1a6-4bf7-a703-f496b71e49db\", \"shortName\": \"EEF\", \"dateUpdated\": \"2026-09-17T14:05:29.472Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-86533\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-09-17T18:17:21.199Z\", \"dateReserved\": \"2026-09-11T18:00:02.036Z\", \"assignerOrgId\": \"6b3ad84c-e1a6-4bf7-a703-f496b71e49db\", \"datePublished\": \"2026-09-17T13:09:37.963Z\", \"assignerShortName\": \"EEF\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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