Fastify Middie Middleware Path Bypass

Summary A security vulnerability exists in @fastify/middie 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...

CVE-2026-22031

@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...

CVE-2026-22037

The @fastify/express plugin adds full Express compatibility to Fastify. A security vulnerability exists in @fastify/express prior to version 4.0.3 where middleware registered with a specific path prefix can be bypassed using URL-encoded characters e.g., /%61dmin instead of /admin. While the...

CVE-2026-22037

The vulnerability affects the @fastify/express plugin (prior to version 4.0.3). Middleware registered for a specific path prefix can be bypassed when the request uses URL-encoded characters (e.g., /%61dmin instead of /admin). The middleware engine fails to match the encoded path, but the underlyi...

CVE-2026-22037 @fastify/express vulnerable to Improper Handling of URL Encoding (Hex Encoding)

The @fastify/express plugin adds full Express compatibility to Fastify. A security vulnerability exists in @fastify/express prior to version 4.0.3 where middleware registered with a specific path prefix can be bypassed using URL-encoded characters e.g., /%61dmin instead of /admin. While the...

CVE-2026-22037

The @fastify/express plugin adds full Express compatibility to Fastify. A security vulnerability exists in @fastify/express prior to version 4.0.3 where middleware registered with a specific path prefix can be bypassed using URL-encoded characters e.g., /%61dmin instead of /admin. While the...

CVE-2026-22037 @fastify/express vulnerable to Improper Handling of URL Encoding (Hex Encoding)

The @fastify/express plugin adds full Express compatibility to Fastify. A security vulnerability exists in @fastify/express prior to version 4.0.3 where middleware registered with a specific path prefix can be bypassed using URL-encoded characters e.g., /%61dmin instead of /admin. While the...

CVE-2026-22031

@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...

CVE-2026-22031

CVE-2026-22031 affects the Fastify middleware plugin @fastify/middie (prior to 9.1.0). A vulnerability allows bypassing a middleware registered with a path prefix by using URL-encoded paths (e.g., /%61dmin). The middie engine uses path-to-regexp for matching; the regex is applied to the undecoded...

CVE-2026-22031 Fastify 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...

CVE-2026-22031 Fastify 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...

CVE-2026-22031

@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...

PT-2026-3448

Name of the Vulnerable Software and Affected Versions @fastify/middie versions prior to 9.1.0 Description A security issue exists in @fastify/middie where middleware registered with a specific path prefix can be bypassed using URL-encoded characters. For example, using /%61dmin instead of /admin...

PT-2026-3452

Name of the Vulnerable Software and Affected Versions @fastify/express versions prior to 4.0.3 Description A security issue exists in the @fastify/express plugin, which provides Express compatibility for Fastify. The problem occurs when middleware is registered with a specific path prefix...

@fastify/express security vulnerability

@fastify/express is a compatibility plugin developed by Fastify. Versions of @fastify/express prior to 4.0.3 contained security vulnerabilities. These vulnerabilities were caused by improper path prefix matching, which could allow middleware to bypass security checks...

Nest has a Fastify URL Encoding Middleware Bypass (TOCTOU)

A NestJS application is vulnerable if it meets all of the following criteria: 1. Platform: Uses @nestjs/platform-fastify. 2. Security Mechanism: Relies on NestMiddleware via MiddlewareConsumer for security checks authentication, authorization, etc., or through app.use 3. Routing: Applies middlewa...

GHSA-8WPR-639P-CCRJ Nest has a Fastify URL Encoding Middleware Bypass (TOCTOU)

A NestJS application is vulnerable if it meets all of the following criteria: 1. Platform: Uses @nestjs/platform-fastify. 2. Security Mechanism: Relies on NestMiddleware via MiddlewareConsumer for security checks authentication, authorization, etc., or through app.use 3. Routing: Applies middlewa...

CVE-2025-69211 Nest has a Fastify URL Encoding Middleware Bypass (TOCTOU)

Nest is a framework for building scalable Node.js server-side applications. Versions prior to 11.1.11 have a Fastify URL encoding middleware bypass. A NestJS application is vulnerable if it uses @nestjs/platform-fastify; relies on NestMiddleware via MiddlewareConsumer for security checks...

CVE-2025-69211 Nest has a Fastify URL Encoding Middleware Bypass (TOCTOU)

Nest is a framework for building scalable Node.js server-side applications. Versions prior to 11.1.11 have a Fastify URL encoding middleware bypass. A NestJS application is vulnerable if it uses @nestjs/platform-fastify; relies on NestMiddleware via MiddlewareConsumer for security checks...

SUSE CVE-2025-66490

Traefik is an HTTP reverse proxy and load balancer. For versions prior to 2.11.32 and 2.11.31 through 3.6.2, requests using PathPrefix, Path or PathRegex matchers can bypass path normalization. When Traefik uses path-based routing, requests containing URL-encoded restricted characters /, , Null,...