CVE-2026-35039
fast-jwt provides fast JSON Web Token (JWT) implementation. From 0.0.1 to before 6.1.0, 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.
Scoring
- Severity
- CRITICAL
- CVSS base score
- 9.1
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
- EPSS probability
- 0.21%
- CWE
- CWE-345, CWE-706, CWE-1289
- Published
- 2026-04-06
- Last modified
- 2026-05-13
Affected products
- nearform fast-jwt
- nearform fast-jwt
Weakness type
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