CVE-2026-82462
Medium
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.
SeverityMedium
CVSS6.5
Exploit probability—
ProductPac4j
PublishedAug 29, 2026
First seenAug 29, 2026
Weakness typeCWE-345CWE-345
How to fix
Update
- pac4j pac4j6.5.6 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| pac4j pac4j | v < 6.5.6 | 6.5.6 |
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