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.
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History
Thu, 12 Mar 2026 21:15:00 +0000
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Thu, 12 Mar 2026 19:15:00 +0000
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| 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. | |
| Title | Tinyauth's OIDC authorization codes are not bound to client on token exchange | |
| Weaknesses | CWE-863 | |
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cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-03-12T20:46:29.581Z
Reserved: 2026-03-11T14:47:05.685Z
Link: CVE-2026-32245
Updated: 2026-03-12T20:43:40.642Z
Status : Awaiting Analysis
Published: 2026-03-12T19:16:19.413
Modified: 2026-03-12T21:07:53.427
Link: CVE-2026-32245
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OpenCVE Enrichment
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