CVE-2026-87004
highTugtainer is a self-hosted app for automating updates of Docker containers.
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.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/Quenary/tugtainer/commit/b55269b6a3bfd43b0f2f5bd5f137ee0c81b7c2e4 security-advisories@github.com
- https://github.com/Quenary/tugtainer/releases/tag/v1.31.3 security-advisories@github.com
- https://github.com/Quenary/tugtainer/security/advisories/GHSA-crjc-6vc7-xrfh security-advisories@github.com
- https://github.com/Quenary/tugtainer/security/advisories/GHSA-crjc-6vc7-xrfh 134c704f-9b21-4f2e-91b3-4a467353bcc0