{"id":"CVE-2026-87004","summary":"Tugtainer: OIDC id_token claims accepted without signature/audience/expiry verification","details":"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.","aliases":["GHSA-crjc-6vc7-xrfh"],"modified":"2026-10-02T03:47:34.876005619Z","published":"2026-09-30T17:01:24.963Z","database_specific":{"cwe_ids":["CWE-347"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/87xxx/CVE-2026-87004.json","cna_assigner":"GitHub_M"},"references":[{"type":"WEB","url":"https://github.com/Quenary/tugtainer/releases/tag/v1.31.3"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/87xxx/CVE-2026-87004.json"},{"type":"ADVISORY","url":"https://github.com/Quenary/tugtainer/security/advisories/GHSA-crjc-6vc7-xrfh"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-87004"},{"type":"FIX","url":"https://github.com/Quenary/tugtainer/commit/b55269b6a3bfd43b0f2f5bd5f137ee0c81b7c2e4"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/quenary/tugtainer","events":[{"introduced":"0"},{"fixed":"b55269b6a3bfd43b0f2f5bd5f137ee0c81b7c2e4"},{"fixed":"476948563a52e77f30c71279aee5e9e42778a7e2"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"1.31.3"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["v1.31.2","v1.31.1","v1.31.0","v1.30.9","v1.30.8","v1.30.7","v1.30.6","v1.30.5","v1.30.4","v1.30.3","v1.30.2","v1.30.1","v1.30.0","v1.29.1","v1.29.0","v1.28.3","v1.28.2","v1.28.1","v1.28.0","v1.27.0","v1.26.0","v1.25.1","v1.25.0","v1.24.1","v1.24.0","v1.23.1","v1.23.0","v1.22.0","v1.21.1","v1.21.0","v1.20.0","v1.19.0","v1.18.0","v1.17.5","v1.17.4","v1.17.3","v1.17.2","v1.17.1","v1.17.0","v1.16.1","v1.16.0","v1.15.2","v1.15.1","v1.15.0","v1.14.4","v1.14.3","v1.14.2","v1.14.1","v1.14.0","v1.13.1","v1.13.0","v1.12.2","v1.12.1","v1.12.0","v1.11.0","v1.10.0","v1.9.0","v1.8.0","v1.7.1","v1.7.0","v1.6.0","v1.5.3","v1.5.2","v1.5.1","v1.5.0","v1.4.2","v1.4.1","v1.4.0","v1.3.0","v1.2.3","v1.2.2","v1.2.1","v1.2.0","v1.1.6","v1.1.5","v1.1.4","v1.1.3","v1.1.2","v1.1.1","v1.1.0","v1.0.3","v1.0.2","v1.0.1","v1.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-87004.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}