Security Advisory

CVE-2026-35039

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-04-06 16:59:43

Last updated 2026-05-13 15:12:43

Assigner GitHub_M

CVSS score 9.1

State PUBLISHED

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.

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