Vulnerability Description
Tinyauth is an authentication and authorization server. Prior to 5.0.3, the OIDC token endpoint does not verify that the client exchanging an authorization code is the same client the code was issued to. A malicious OIDC client operator can exchange another client's authorization code using their own client credentials, obtaining tokens for users who never authorized their application. This violates RFC 6749 Section 4.1.3. This vulnerability is fixed in 5.0.3.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Tinyauth | Tinyauth | <= 5.0.2 |
Related Weaknesses (CWE)
References
- https://github.com/steveiliop56/tinyauth/commit/b2a1bfb1f532e87f205fa3afa3fc9f14Patch
- https://github.com/steveiliop56/tinyauth/releases/tag/v5.0.3Release Notes
- https://github.com/steveiliop56/tinyauth/security/advisories/GHSA-xg2q-62g2-cvcmExploitThird Party Advisory
FAQ
What is CVE-2026-32245?
CVE-2026-32245 is a vulnerability with a CVSS score of 6.5 (MEDIUM). Tinyauth is an authentication and authorization server. Prior to 5.0.3, the OIDC token endpoint does not verify that the client exchanging an authorization code is the same client the code was issued ...
How severe is CVE-2026-32245?
CVE-2026-32245 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-32245?
Check the references section above for vendor advisories and patch information. Affected products include: Tinyauth Tinyauth.