CVSS 3.1
6.5 mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:NCVE-2026-32245
Medium (6.5) in tinyauth tinyauth. EPSS 0.3% chance of exploitation in the next 30 days. Fixed in github.com/steveiliop56/tinyauth 1.0.1-20260311144920-9eb2d33064b7.
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.
Severity
- EPSS
- 0.3% chance of exploitation in the next 30 days; higher than 18% of CVEs (scores of 2026-10-31)
- CWE
- CWE-863
- Published
- Modified
- Record from
- the NVD, synced
Affected
- tinyauth:tinyauth
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-xg2q-62g2-cvcm | Go | github.com/steveiliop56/tinyauth | <1.0.1-20260311144920-9eb2d33064b7 | 1.0.1-20260311144920-9eb2d33064b7 |
| GO-2026-4689 | Go | github.com/steveiliop56/tinyauth | all versions | no fix published |