Vulnerability Description
auth provides authentication via oauth2, direct and email. From versions 1.18.0 to before 1.25.2 and 2.0.0 to before 2.1.2, the Patreon OAuth provider maps every authenticated Patreon account to the same local user.ID, instead of deriving a unique ID from the Patreon account returned by Patreon. In practice, this means all Patreon-authenticated users of an application using this library are collapsed into a single local identity. Any application that trusts token.User.ID as the stable account key can end up mixing or fully merging unrelated Patreon users, which can lead to cross-account access, privilege confusion, and subscription-state leakage. This issue has been patched in versions 1.25.2 and 2.1.2.
CVSS Score
CRITICAL
Related Weaknesses (CWE)
References
- https://github.com/go-pkgz/auth/commit/c0b15ee72a8401da83c01781c16636c521f42698
- https://github.com/go-pkgz/auth/releases/tag/v1.25.2
- https://github.com/go-pkgz/auth/releases/tag/v2.1.2
- https://github.com/go-pkgz/auth/security/advisories/GHSA-f6qq-3m3h-4g42
- https://github.com/go-pkgz/auth/security/advisories/GHSA-f6qq-3m3h-4g42
FAQ
What is CVE-2026-42560?
CVE-2026-42560 is a vulnerability with a CVSS score of 9.1 (CRITICAL). auth provides authentication via oauth2, direct and email. From versions 1.18.0 to before 1.25.2 and 2.0.0 to before 2.1.2, the Patreon OAuth provider maps every authenticated Patreon account to the s...
How severe is CVE-2026-42560?
CVE-2026-42560 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-42560?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.