CVE-2026-80218
- Source
- https://cve.org/CVERecord?id=CVE-2026-80218
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80218.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-80218
- Aliases
-
- EEF-CVE-2026-80218
- GHSA-3pr8-f99q-86hp
- Published
- 2026-09-17T13:09:25Z
- Modified
- 2026-09-20T11:30:50Z
- Severity
-
- 7.6 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N CVSS Calculator
- Summary
- Sign-in token minted for one resource accepted by another in AshAuthentication
- Details
-
Improper Authentication vulnerability in team-alembic AshAuthentication allows an attacker holding a sign-in token for one authenticated resource to be signed in as a user of a different resource.
AshAuthentication.Strategy.Password.SignInWithTokenPreparation.extract_primary_keys_from_subject/2 parses the JWT sub claim (for example user?id=1) with URI.parse/1 and keeps only its query string, discarding the path segment that names the subject the token was issued for. Nothing else restores that binding: AshAuthentication.Jwt.verify/3 checks the signature, exp, nbf, jti and the library-version claims, the purpose check only requires sign_in, and the remaining comparison is over primary-key field names, which are identical across resources. The WebAuthn sign-in and remember-me preparations carry copies of the same helper and drop the path in the same way. The magic link sign-in path pins the subject name against the resource and is not affected.
This issue affects ash_authentication: from 3.10.5 before 4.15.0 and from 5.0.0-rc.0 before 5.0.0-rc.14.
- Database specific
{ "cna_assigner": "EEF", "cwe_ids": [ "CWE-287" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80218.json", "unresolved_ranges": [ { "extracted_events": [ { "introduced": "eca8cadea0f1595ed2c10a0c177b1da9aa9e5269" }, { "fixed": "*" } ], "source": "AFFECTED_FIELD" } ] }- References
-
- https://cna.erlef.org/cves/CVE-2026-80218.html
- https://github.com
- https://osv.dev/vulnerability/EEF-CVE-2026-80218
- https://repo.hex.pm
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80218.json
- https://github.com/team-alembic/ash_authentication/security/advisories/GHSA-3pr8-f99q-86hp
- https://nvd.nist.gov/vuln/detail/CVE-2026-80218
- https://github.com/team-alembic/ash_authentication/commit/2640e1872e1fef4e4606e601bf00102cff784c03
- https://github.com/team-alembic/ash_authentication/commit/7baac243ca651eee127a84d672eee3fcff42e598
- https://github.com/team-alembic/ash_authentication/commit/eca8cadea0f1595ed2c10a0c177b1da9aa9e5269
- https://github.com/team-alembic/ash_authentication
Affected packages
Git / github.com/team-alembic/ash_authentication
Affected ranges
- Type
- GIT
- Repo
- https://github.com/team-alembic/ash_authentication
- Events
-
IntroducedFixedIntroducedFixedFixedFixedFixed
- Database specific
-
Show details
{ "extracted_events": [ { "introduced": "3.10.5" }, { "fixed": "4.15.0" }, { "introduced": "5.0.0-rc.0" }, { "fixed": "5.0.0-rc.14" } ], "source": [ "DESCRIPTION", "REFERENCES" ] }