CVE-2026-29000 — pac4j-jwt JwtAuthenticator Authentication Bypass
pac4j-jwt versions prior to 4.5.9, 5.7.9, and 6.3.3 contain an authentication bypass vulnerability in JwtAuthenticator when processing encrypted JWTs that allows remote attacker…
Published: 2026-03-04 · CVSS: 9.3 · CVSS 4.0
pac4j-jwt versions prior to 4.5.9, 5.7.9, and 6.3.3 contain an authentication bypass vulnerability in JwtAuthenticator when processing encrypted JWTs that allows remote attackers to forge authentication tokens. Attackers who possess the server's RSA public key can create a JWE-wrapped PlainJWT with arbitrary subject and role claims, bypassing signature verification to authenticate as any user including administrators.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7