Is CVE-2026-82462 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-82462?

CVE-2026-82462 has a CVSS v3 severity of MEDIUM (6.5).

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CVE-2026-82462

Description

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.