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CVE-2026-35041

MEDIUM

4.2

Descricao

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.

Detalhes CVE

Pontuacao CVSS v3.14.2

SeveridadeMEDIUM

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

Vetor de ataqueNETWORK

ComplexidadeHIGH

Privilegios necessariosHIGH

Interacao do usuarioREQUIRED

Publicado4/9/2026

Ultima modificacao4/14/2026

Fontenvd

Avistamentos honeypot0

Produtos afetados

nearform:fast-jwt

Fraquezas (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)

Correlacoes IOC

Sem correlacoes registradas

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