VULNERABILITY INTELLIGENCE

CVE-2026-35039

CVSS score9.1 CRITICAL
EPSS probability0.21%
CISA KEVNot currently listed
Published2026-04-06
Last modified2026-10-23
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Description

fast-jwt provides fast JSON Web Token (JWT) implementation. From 0.0.1 to before 6.2.0, setting up a custom cacheKeyBuilder method which does not properly create unique keys for different tokens can lead to cache collisions. This could cause tokens to be mis-identified during the verification process leading to valid tokens returning claims from different valid tokens and users being mis-identified as other users based on the wrong token. Version 6.2.0 contains a patch.

Weakness classification

  • security-advisories@github.com: CWE-345

Primary references