CVE-2026-29000
pac4j-jwt: JwtAuthenticator Authentication Bypass via JWE-Wrapped PlainJWT
Severidad por fuente
La etiqueta propia de Trivy es CRITICAL. Crítica según GHSA.
Descripción
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.
Paquetes afectados y versiones corregidas
| Fuente | Paquete | Corregido en |
|---|---|---|
| maven::GitHub Security Advisory Maven | org.pac4j:pac4j-jwt | 6.3.3, 5.7.9, 4.5.9 |
Referencias
- https://github.com/pac4j/pac4j
- https://nvd.nist.gov/vuln/detail/CVE-2026-29000
- https://www.codeant.ai/security-research/pac4j-jwt-authentication-bypass-public-key
- https://www.pac4j.org/blog/security-advisory-pac4j-jwt-jwtauthenticator.html
- https://www.vulncheck.com/advisories/pac4j-jwt-jwtauthenticator-authentication-bypass