{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-87004","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-09-08T16:44:23.782Z","datePublished":"2026-09-30T17:01:24.963Z","dateUpdated":"2026-09-30T18:01:20.063Z"},"containers":{"cna":{"title":"Tugtainer: OIDC id_token claims accepted without signature/audience/expiry verification","problemTypes":[{"descriptions":[{"cweId":"CWE-347","lang":"en","description":"CWE-347: Improper Verification of Cryptographic Signature","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.1,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"references":[{"name":"https://github.com/Quenary/tugtainer/security/advisories/GHSA-crjc-6vc7-xrfh","tags":["x_refsource_CONFIRM"],"url":"https://github.com/Quenary/tugtainer/security/advisories/GHSA-crjc-6vc7-xrfh"},{"name":"https://github.com/Quenary/tugtainer/commit/b55269b6a3bfd43b0f2f5bd5f137ee0c81b7c2e4","tags":["x_refsource_MISC"],"url":"https://github.com/Quenary/tugtainer/commit/b55269b6a3bfd43b0f2f5bd5f137ee0c81b7c2e4"},{"name":"https://github.com/Quenary/tugtainer/releases/tag/v1.31.3","tags":["x_refsource_MISC"],"url":"https://github.com/Quenary/tugtainer/releases/tag/v1.31.3"}],"affected":[{"vendor":"Quenary","product":"tugtainer","versions":[{"version":"< 1.31.3","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-09-30T17:01:24.963Z"},"descriptions":[{"lang":"en","value":"Tugtainer is a self-hosted app for automating updates of Docker containers. Prior to version 1.31.3, when the OIDC login flow completes, backend/modules/auth/providers/auth_oidc_provider.py decodes the id_token returned by the identity provider's token endpoint using jose.jwt.get_unverified_claims() instead of jwt.decode(). This skips signature verification, audience (aud) validation, issuer (iss) validation, and expiry (exp) checking entirely. The extracted claims (email/sub/preferred_username) are then used directly as the user_id for the resulting Tugtainer session. This issue has been patched in version 1.31.3."}],"source":{"advisory":"GHSA-crjc-6vc7-xrfh","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/Quenary/tugtainer/security/advisories/GHSA-crjc-6vc7-xrfh","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-30T18:00:13.050961Z","id":"CVE-2026-87004","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-09-30T18:01:20.063Z"}}]}}