CVE-2026-22031

Katalog CVE

CVSS 8.8 · High EPSS 0,53%

Kerentanan Improper Handling of URL Encoding (Hex Encoding) pada fastify/middie. Skor CVSS 3.1 8.8 (High) menurut NVD.

Deskripsi (NVD)

@fastify/middie is the plugin that adds middleware support on steroids to Fastify. A security vulnerability exists in @fastify/middie prior to version 9.1.0 where middleware registered with a specific path prefix can be bypassed using URL-encoded characters (e.g., `/%61dmin` instead of `/admin`). While the middleware engine fails to match the encoded path and skips execution, the underlying Fastify router correctly decodes the path and matches the route handler, allowing attackers to access protected endpoints without the middleware constraints. Version 9.1.0 fixes the issue.

Rincian

Terbit di NVD

19 Januari 2026

Terakhir diubah

17 Juni 2026

Status NVD

Analyzed

CVSS 3.1

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

Jenis kelemahan (CWE)

CWE-177: Improper Handling of URL Encoding (Hex Encoding)

EPSS (30 hari)

0,53% peluang dieksploitasi; lebih tinggi dari 42,9% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/fastify/middie/security/advisories/GHSA-cxrg-g7r8-w69p exploit · advisory vendor
• https://github.com/fastify/middie/commit/d44cd56eb724490babf7b452fdbbdd37ea2effba patch
• https://github.com/fastify/middie/pull/245 issue tracking · patch
• https://github.com/fastify/middie/releases/tag/v9.1.0 product · release notes