CVE-2025-69211

The record

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 (authentication, authorization, etc.), or through `app.use()`; and applies middleware to specific routes using string paths or controllers (e.g., `.forRoutes('admin')`). Exploitation can result in unauthenticated users accessing protected routes, restricted administrative endpoints becoming accessible to lower-privileged users, and/or middleware performing sanitization or validation being skipped. This issue is patched in `@nestjs/platform-fastify@11.1.11`.

Affected packages

Related vulnerabilities

• GHSA-8wpr-639p-ccrj Nest has a Fastify URL Encoding Middleware Bypass (TOCTOU) Same vulnerability
• CVE-2026-54281 Nest is a framework for building scalable Node.js server-side applications. Also affects @nestjs/platform-fastify
• GHSA-6v32-fjc9-9qf6 Nest: Middleware Bypass on Fastify via Trailing Slash Also affects @nestjs/platform-fastify
• CVE-2026-33011 Nest is a framework for building scalable Node.js server-side applications. Also affects @nestjs/platform-fastify
• GHSA-wf42-42fg-fg84 Nest Fastify HEAD Request Middleware Bypass Also affects @nestjs/platform-fastify
• GHSA-r4wm-x892-vjmx Nest has a Fastify URL Encoding Middleware Bypass Also affects @nestjs/platform-fastify
• GHSA-7q64-3rg2-h9pf Duplicate Advisory: Nest has a Fastify URL Encoding Middleware Bypass Also affects @nestjs/platform-fastify
• CVE-2026-2293 A NestJS application using @nestjs/platform-fastify can allow bypass of… Also affects @nestjs/platform-fastify