CVE-2026-35042: nearform fast-jwt

csirt@kutim:~/threat-intel/cve/CVE-2026-35042

CVSS 7.5 · High EPSS 0,20%

Kerentanan Insufficient Verification of Data Authenticity pada nearform fast-jwt. Skor CVSS 3.1 7.5 (High) menurut github.com.

Deskripsi (NVD)

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.

Rincian

Terbit di NVD: 6 April 2026
Terakhir diubah: 17 Juni 2026
Status NVD: Analyzed
CVSS 3.1: 7.5 (High), sumber github.com
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N · uraikan di kalkulator
Jenis kelemahan (CWE): CWE-345: Insufficient Verification of Data Authenticity
CWE-636: Not Failing Securely ('Failing Open')
EPSS (30 hari): 0,20% peluang dieksploitasi; lebih tinggi dari 9,0% CVE lain

Produk dan versi terdampak

Vendor	Produk	Versi terdampak
nearform	fast-jwt	Semua versi sebelum 6.2.0

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

https://github.com/nearform/fast-jwt/security/advisories/GHSA-hm7r-c7qw-ghp6 exploit · mitigasi · advisory vendor
https://www.rfc-editor.org/rfc/rfc7515.html#section-4.1.11 deskripsi teknis

Sumber: NVD · CVE.org · EPSS. Halaman ini disusun otomatis dari data tersebut; pembaruan terakhir 5 Okt 2026, 20:11 WITA. Kalau sistem di Perangkat Daerah memakai produk ini dan butuh bantuan, laporkan lewat kanal pelaporan.