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.
Fix
Patch, vendor advisory and mitigation references on NVD 2
- https://github.com/nearform/fast-jwt/commit/de121056c6415b58770c60640881eaec67ac4ceb Patch
- https://github.com/nearform/fast-jwt/security/advisories/GHSA-rp9m-7r4c-75qg Mitigation, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 9.1 · nearformNVD modified 2026-10-23 23:10
Affected (CPE criteria) 1
cpe:2.3:a:nearform:fast-jwt:*:*:*:*:*:node.js:*:*