CRITICAL SeverityCVSS 4.010.0CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L

CVE-2026-29000

Last updated Mar 04, 2026 · Published Mar 04, 2026

Description

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.

Affected products

1 listed

pac4j:pac4j-jwt

Mappings

CWE

CWE-347

CAPEC

None listed.