Unknown · Pac4J-Oidc · CVE-2026-82462
**Name of the Vulnerable Software and Affected Versions**
pac4j-oidc versions prior to 6.5.6
**Description**
The software accepts OpenID Connect (OIDC) callbacks that contain only an access token, bypassing the required authorization code or ID token validation. This allows attackers to use access tokens intended for different clients to establish authenticated sessions because the system fails to verify the issuer, audience, nonce, or subject.
**Recommendations**
Update pac4j-oidc to version 6.5.6 or later.