CVE-2026-33808

Katalog CVE

CVSS 9.1 · Critical EPSS 0,55%

Kerentanan Interpretation Conflict pada fastify/express. Skor CVSS 3.1 9.1 (Critical) menurut NVD.

Deskripsi (NVD)

Impact@fastify/express v4.0.4 and earlier fails to normalize URLs before passing them to Express middleware when Fastify router normalization options are enabled. This allows complete bypass of path-scoped authentication middleware via duplicate slashes when ignoreDuplicateSlashes is enabled, or via semicolon delimiters when useSemicolonDelimiter is enabled. In both cases, Fastify router normalizes the URL and matches the route, but @fastify/express passes the original un-normalized URL to Express middleware, which fails to match and is skipped. An unauthenticated attacker can access protected routes by manipulating the URL path. PatchesUpgrade to @fastify/express v4.0.5 or later.

Rincian

Terbit di NVD

15 April 2026

Terakhir diubah

17 Juni 2026

Status NVD

Analyzed

CVSS 3.1

9.1 (Critical), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-436: Interpretation Conflict

EPSS (30 hari)

0,55% peluang dieksploitasi; lebih tinggi dari 44,5% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://cna.openjsf.org/security-advisories.html advisory vendor
• https://github.com/fastify/fastify-express/security/advisories/GHSA-6hw5-45gm-fj88 exploit · mitigasi · advisory vendor