Ghostwire

CVE-2026-107724: fast-jwt treats raw public JWK JSON as an HMAC secret, enabling HS256 token forgery

HIGH CVSS 7.4 EPSS 0.22% Exploit Available 2 PoC

Published: October 8, 2026 | Last Modified: October 8, 2026

Description

fast-jwt treats raw public JWK JSON as an HMAC secret, enabling HS256 token forgery

Ghostwire Analysis — What This Means Practically

Exploitation Probability (EPSS): Low — 0.22% (12th percentile)

Low exploitation probability based on current threat landscape data. Standard patching timeline is appropriate.

This analysis is generated by Ghostwire from NVD, CISA KEV, EPSS, and open-source intelligence data. Verify findings through primary sources before acting.

Proof-of-Concept Exploits (2)

Security Coverage (1 articles)

References