GCVE-110-NCSC-2026-95

Advisory PublishedCVSS 10.0/10

Vulnetix · Advisory published March 12, 2026

pac4j-jwt versions before 4.5.9, 5.7.9, and 6.3.3 contain a JwtAuthenticator vulnerability allowing attackers with the server's RSA public key to forge tokens and bypass signature verification, enabling user impersonation including administrators.

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Weaknesses (CWE)

CWE-347Improper Verification of Cryptographic Signature

Risk Scores

CVSS 3.1

10.0/10

Critical · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:L

Affected Products

Vendor	Product	Versions	Platforms
pac4j	vers:unknown/*	—	—

Aliases

CVE-2026-29000

References

advisory

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