{"id":"CVE-2026-87004","state":"PUBLISHED","title":"Tugtainer: OIDC id_token claims accepted without signature/audience/expiry verification","description":"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.","publishedAt":"2026-09-30T17:01:24.963Z","updatedAt":"2026-09-30T18:01:20.063Z","severity":{"score":8.1,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["Quenary tugtainer"],"affected":[{"vendor":"Quenary","product":"tugtainer","versions":[{"version":"< 1.31.3","status":"affected"}]}],"references":["https://github.com/Quenary/tugtainer/security/advisories/GHSA-crjc-6vc7-xrfh","https://github.com/Quenary/tugtainer/commit/b55269b6a3bfd43b0f2f5bd5f137ee0c81b7c2e4","https://github.com/Quenary/tugtainer/releases/tag/v1.31.3"],"weaknesses":["CWE-347"],"ingestedAt":"2026-10-29T20:13:26.108Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/87xxx/CVE-2026-87004.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-87004","state":"PUBLISHED","datePublished":"2026-09-30T17:01:24.963Z","dateUpdated":"2026-09-30T18:01:20.063Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-09-08T16:44:23.782Z"},"containers":{"cna":{"title":"Tugtainer: OIDC id_token claims accepted without signature/audience/expiry verification","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."}],"affected":[{"vendor":"Quenary","product":"tugtainer","versions":[{"version":"< 1.31.3","status":"affected"}]}],"references":[{"url":"https://github.com/Quenary/tugtainer/security/advisories/GHSA-crjc-6vc7-xrfh","name":"https://github.com/Quenary/tugtainer/security/advisories/GHSA-crjc-6vc7-xrfh","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/Quenary/tugtainer/commit/b55269b6a3bfd43b0f2f5bd5f137ee0c81b7c2e4","name":"https://github.com/Quenary/tugtainer/commit/b55269b6a3bfd43b0f2f5bd5f137ee0c81b7c2e4","tags":["x_refsource_MISC"]},{"url":"https://github.com/Quenary/tugtainer/releases/tag/v1.31.3","name":"https://github.com/Quenary/tugtainer/releases/tag/v1.31.3","tags":["x_refsource_MISC"]}],"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"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-347","lang":"en","description":"CWE-347: Improper Verification of Cryptographic Signature","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-09-30T17:01:24.963Z"},"source":{"advisory":"GHSA-crjc-6vc7-xrfh","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","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"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-30T18:01:20.063Z"}}]}}}