8.8
CVE-2026-22031
- EPSS 0.46%
- Veröffentlicht 19.01.2026 15:24:45
- Zuletzt bearbeitet 14.05.2026 15:41:44
- Quelle security-advisories@github.com
- CVE-Watchlists
- Unerledigt
LoginFastify Middie Middleware Path Bypass
@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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Fastify ≫ Fastify/middie SwPlatformnode.js Version < 9.1.0
| Typ | Quelle | Score | Percentile |
|---|---|---|---|
| EPSS | FIRST.org | 0.46% | 0.362 |
| Quelle | Base Score | Exploit Score | Impact Score | Vector String |
|---|---|---|---|---|
| nvd@nist.gov | 8.8 | 2.8 | 5.9 |
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
|
| security-advisories@github.com | 8.4 | 1.8 | 6 |
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L
|
CWE-177 Improper Handling of URL Encoding (Hex Encoding)
The product does not properly handle when all or part of an input has been URL encoded.
https://github.com/fastify/middie/security/advisories/GHSA-cxrg-g7r8-w69p
https://github.com/fastify/middie/pull/245
https://github.com/fastify/middie/commit/d44cd56eb724490babf7b452fdbbdd37ea2effba
https://github.com/fastify/middie/releases/tag/v9.1.0