Nest has a Fastify URL Encoding Middleware Bypass

Impact What kind of vulnerability is it? Who is impacted? A NestJS application using @nestjs/platform-fastify can allow bypass of any middleware when Fastify path-normalization options e.g., ignoreTrailingSlash, ignoreDuplicateSlashes, useSemicolonDelimiter are enabled. In affected route-scoped...

GHSA-R4WM-X892-VJMX Nest has a Fastify URL Encoding Middleware Bypass

Impact What kind of vulnerability is it? Who is impacted? A NestJS application using @nestjs/platform-fastify can allow bypass of any middleware when Fastify path-normalization options e.g., ignoreTrailingSlash, ignoreDuplicateSlashes, useSemicolonDelimiter are enabled. In affected route-scoped...

GHSA-8P85-9QPW-FWGW @fastify/middie has Improper Path Normalization when Using Path-Scoped Middleware

Summary A path normalization inconsistency in @fastify/middie can result in authentication/authorization bypass when using path-scoped middleware for example, app.use'/secret', auth. When Fastify router normalization options are enabled such as ignoreDuplicateSlashes, useSemicolonDelimiter, and...

Duplicate Advisory: Nest has a Fastify URL Encoding Middleware Bypass

Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-r4wm-x892-vjmx. This link is maintained to preserve external references. Original Description A NestJS application using @nestjs/platform-fastify can allow bypass of authentication/authorization middleware when...

CVE-2026-25891

Fiber is an Express inspired web framework written in Go. A Path Traversal CWE-22 vulnerability in Fiber allows a remote attacker to bypass the static middleware sanitizer and read arbitrary files on the server file system on Windows. This affects Fiber v3 through version 3.0.0. This has been...

Next.js 15.2.3 Middleware Bypass Scanner

A vulnerability exists in the Next.js middleware handling mechanism, where requests containing the "x-middleware-subrequest" header are processed differently compared to normal requests, potentially allowing attackers to bypass authentication. This is a scanner to test version 15.2.3...

📄 Next.js 15.2.3 Middleware Authorization Bypass

This Python script checks whether a website built with Next.js is vulnerable to CVE‑2025‑29927, a middleware authorization bypass flaw triggered by the request header:x-middleware-subrequest...

http-protection security vulnerabilities

http-protection is a network attack protection library developed by Rogério Zambon. Version 0.2.0 of http-protection contains security vulnerabilities; these vulnerabilities stem from IP spoofing, which may allow attackers to bypass the protected middleware and gain unauthorized access...

📄 Next.js 13.5.9 Middleware Bypass Scanner

This is an authorization bypass scanner for Next.js versions 13.5.9 and below. A vulnerability exists in the Next.js middleware handling mechanism, where requests containing the "x-middleware-subrequest" header are processed differently compared to normal requests...

Exploit for Improper Authorization in Vercel Next.Js

PoC: CVE-2025-29927 - Next.js Middleware Bypass This reposito...

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...

GHSA-G6Q3-96CP-5R5M @fastify/express vulnerable to Improper Handling of URL Encoding (Hex Encoding)

Summary A security vulnerability exists in @fastify/express 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 Fastif...

EUVD-2026-3320

@fastify/express vulnerable to Improper Handling of URL Encoding Hex Encoding...

@fastify/express vulnerable to Improper Handling of URL Encoding (Hex Encoding)

Summary A security vulnerability exists in @fastify/express 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 Fastif...

EUVD-2026-3321

Fastify Middie Middleware Path Bypass...

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 @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 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...