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CVE-2026-35041

MEDIUM

4.2

Descripcion

fast-jwt provides fast JSON Web Token (JWT) implementation. From 5.0.0 to 6.2.0, a denial-of-service condition exists in fast-jwt when the allowedAud verification option is configured using a regular expression. Because the aud claim is attacker-controlled and the library evaluates it against the supplied RegExp, a crafted JWT can trigger catastrophic backtracking in the JavaScript regex engine, resulting in significant CPU consumption during verification. This vulnerability is fixed in 6.2.1.

Detalles CVE

Puntuacion CVSS v3.14.2

SeveridadMEDIUM

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

Vector de ataqueNETWORK

ComplejidadHIGH

Privilegios requeridosHIGH

Interaccion usuarioREQUIRED

Publicado4/9/2026

Ultima modificacion4/14/2026

Fuentenvd

Avistamientos honeypot0

Productos afectados

nearform:fast-jwt

Debilidades (CWE)

CWE-1333

Referencias

https://github.com/nearform/fast-jwt/commit/b0be0ca161593836a153d5180ca5358ad9b5de94(security-advisories@github.com)

https://github.com/nearform/fast-jwt/pull/595(security-advisories@github.com)

https://github.com/nearform/fast-jwt/releases/tag/v6.2.1(security-advisories@github.com)

https://github.com/nearform/fast-jwt/security/advisories/GHSA-cjw9-ghj4-fwxf(security-advisories@github.com)

https://github.com/nearform/fast-jwt/security/advisories/GHSA-cjw9-ghj4-fwxf(134c704f-9b21-4f2e-91b3-4a467353bcc0)

Correlaciones IOC

Sin correlaciones registradas

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