CVE-2026-32245: medium-severity vulnerability in steveiliop56 tinyauth
Tinyauth's OIDC authorization codes are not bound to client on token exchange
Published
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.5epss 0.3%
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:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:H/A:N
Affected products
steveiliop56 · tinyauthRelated CVEs — steveiliop56 tinyauth
In the same product, most dangerous first.