cvedb.io
CVE-2026-35039
CRITICAL · CVSS 9.1
EPSS exploitation probability: 0%
Published 2026-04-06T17:17:13.243 · Last modified 2026-06-17T10:40:00.457

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 products

nearform — fast-jwt

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.