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CVE-2026-35039

fast-jwt Affected by Cache Confusion via cacheKeyBuilder Collisions Can Return Claims From a Different Token (Identity/Authorization Mixup) PUBLISHED

Description (CNA)

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 (CNA)

Vendor / productVersions
nearform / fast-jwtaffected >= 0.0.1, < 6.2.0

CWE

CWE-345, CWE-706, CWE-1289

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.