CVE-2026-35042

HIGH

7.5

Descripcion

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.

Detalles CVE

Puntuacion CVSS v3.17.5

SeveridadHIGH

Vector CVSSCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Vector de ataqueNETWORK

ComplejidadLOW

Privilegios requeridosNONE

Interaccion usuarioNONE

Publicado4/6/2026

Ultima modificacion4/6/2026

Fuentenvd

Avistamientos honeypot0

Debilidades (CWE)

CWE-345CWE-636

Referencias

https://github.com/nearform/fast-jwt/security/advisories/GHSA-hm7r-c7qw-ghp6(security-advisories@github.com)

https://www.rfc-editor.org/rfc/rfc7515.html#section-4.1.11(security-advisories@github.com)

Correlaciones IOC

Sin correlaciones registradas

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