cvedb.io
CVE-2026-35042
HIGH · CVSS 7.5
EPSS exploitation probability: 0%
Published 2026-04-06T17:17:13.410 · Last modified 2026-06-17T10:40:00.837

Summary

fast-jwt provides fast JSON Web Token (JWT) implementation. In 6.1.0 and earlier, fast-jwt does not validate the crit (Critical) Header Parameter defined in RFC 7515 §4.1.11. When a JWS token contains a crit array listing extensions that fast-jwt does not understand, the library accepts the token instead of rejecting it. This violates the MUST requirement in the RFC.

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.