CVE-2026-29000

CRITICAL

9.1

Descripcion

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.

Detalles CVE

Puntuacion CVSS v3.19.1

SeveridadCRITICAL

Vector CVSSCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Vector de ataqueNETWORK

ComplejidadLOW

Privilegios requeridosNONE

Interaccion usuarioNONE

Publicado3/4/2026

Ultima modificacion3/10/2026

Fuentenvd

Avistamientos honeypot0

Debilidades (CWE)

CWE-347

Referencias

https://www.codeant.ai/security-research/pac4j-jwt-authentication-bypass-public-key(disclosure@vulncheck.com)

https://www.pac4j.org/blog/security-advisory-pac4j-jwt-jwtauthenticator.html(disclosure@vulncheck.com)

https://www.vulncheck.com/advisories/pac4j-jwt-jwtauthenticator-authentication-bypass(disclosure@vulncheck.com)

Correlaciones IOC

Sin correlaciones registradas

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