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`.
References
| Link | Resource |
|---|---|
| https://github.com/nestjs/nest/commit/c4cedda15a05aafec1e6045b36b0335ab850e771 | Patch |
| https://github.com/nestjs/nest/security/advisories/GHSA-8wpr-639p-ccrj | Exploit Vendor Advisory |
Configurations
History
05 Oct 2026, 19:10
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Information
Published : 2025-12-29 16:15
Updated : 2026-10-07 12:10
NVD link : CVE-2025-69211
Mitre link : CVE-2025-69211
CVE.ORG link : CVE-2025-69211
JSON object : View
Products Affected
nestjs
- nest
CWE
CWE-367
Time-of-check Time-of-use (TOCTOU) Race Condition