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.
Metrics
Affected Vendors & Products
References
History
Thu, 05 Mar 2026 17:15:00 +0000
| Type | Values Removed | Values Added |
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| Metrics |
ssvc
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Wed, 04 Mar 2026 22:30:00 +0000
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| First Time appeared |
Pac4j
Pac4j pac4j |
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| CPEs | cpe:2.3:a:pac4j:pac4j:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Pac4j
Pac4j pac4j |
Wed, 04 Mar 2026 22:00:00 +0000
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| 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. | |
| Title | pac4j-jwt JwtAuthenticator Authentication Bypass | |
| Weaknesses | CWE-347 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: VulnCheck
Published: 2026-03-04T21:49:29.340Z
Updated: 2026-03-04T22:18:27.284Z
Reserved: 2026-03-03T16:42:01.012Z
Link: CVE-2026-29000
Updated: 2026-03-05T16:21:48.858Z
Status : Received
Published: 2026-03-04T22:16:18.783
Modified: 2026-03-04T22:16:18.783
Link: CVE-2026-29000
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