auth: Patreon provider assigns the same local user ID to every authenticated Patreon account, enabling cross‑user impersonation — CVE-2026-42560

Summary

### Summary 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…

Product

go: github.com/go-pkgz/auth | go: github.com/go-pkgz/auth/v2

What to do

General, cautious steps (verify details in the official source):

• Prioritize patching or mitigation immediately (treat as actively risky).
• Identify affected product versions in your inventory and verify whether you are impacted.
• Apply vendor patches/updates or recommended mitigations as soon as available.
• Read the official advisory for exact affected versions and remediation steps.

Official advisory

• Read the official source
• CVE Record
• NVD

Related advisories