CVE-2026-35039
CVE-2026-35039
9.1
CriticalPublished:
Last updated:
Source:security-advisories@github.com
Analyzed
Weakness (CWE)
CVSS Vector
v3.1- Attack Vector
- Network
- Attack Complexity
- Low
- Privileges Required
- None
- User Interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- None
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.
References
security-advisories@github.com
https://github.com/nearform/fast-jwt/commit/de121056c6415b58770c60640881eaec67ac4cebsecurity-advisories@github.com
https://github.com/nearform/fast-jwt/security/advisories/GHSA-rp9m-7r4c-75qg