Description

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.

INFO

Published Date :

2026-04-06T17:02:12.180Z

Last Modified :

2026-04-06T17:02:12.180Z

Source :

GitHub_M
AFFECTED PRODUCTS

The following products are affected by CVE-2026-35042 vulnerability.

Vendors Products
Nearform
  • Fast-jwt
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-35042.

URL Resource
https://github.com/nearform/fast-jwt/security/advisories/GHSA-hm7r-c7qw-ghp6 cve-icon cve-icon
https://www.rfc-editor.org/rfc/rfc7515.html#section-4.1.11 cve-icon cve-icon
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