CVE-2026-82462

pac4j-oidc versions prior to 6.5.6 contain an authentication bypass vulnerability in the OIDC callback handling. The OidcCredentialsExtractor accepts callbacks carrying only an access token without requiring an authorization code or ID token, allowing attackers to substitute access tokens minted ...

EUVD-2026-68119

pac4j-oidc before 6.5.6 accepts OIDC callbacks carrying only an access token without authorization code or ID token validation. Attackers can substitute access tokens minted for other clients to create authenticated sessions without proper issuer, audience, nonce, or subject verification...

CVE-2026-82461

pac4j-oidc versions before 6.5.6 fail to verify access token signatures, issuers, audiences, or expiry when extracting Keycloak realm and client roles via the KeycloakRolesAuthorizationGenerator component. Attackers with low privileges can forge access tokens containing administrative roles paire...

EUVD-2026-68118

pac4j-oidc before 6.5.6 fails to verify access token signatures, issuers, audiences, or expiry when extracting Keycloak realm and client roles. Attackers can forge access tokens with administrative roles paired with valid ID tokens to bypass authorization checks in applications relying on pac4j...