CVE-2026-35039

Summary

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.

Affected Software

VendorProductVersion RangeStatus
nearformfast-jwt>= 0.0.1, < 6.2.0affected

Weaknesses

  • CWE-345: CWE-345: Insufficient Verification of Data Authenticity
  • CWE-706: CWE-706: Use of Incorrectly-Resolved Name or Reference
  • CWE-1289: CWE-1289: Improper Validation of Unsafe Equivalence in Input

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: yes
    • Technical Impact: total

References