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EUVD-2026-276675

fkie_cve-2026-33011

Nest is a framework for building scalable Node.js server-side applications. In versions 11.1.15 and below, a NestJS application using @nestjs/platform-fastify GET middleware can be bypassed because Fastify automatically redirects HEAD requests to the corresponding GET handlers (if they exist). As a result: middleware will be completely skipped, the HTTP response won't include a body (since the response is truncated when redirecting a HEAD request to a GET handler), and the actual handler will still be executed. This issue is fixed in version 11.1.16.

GHSA-wf42-42fg-fg84 — Nest Fastify HEAD Request Middleware Bypass

Affected: npm: @nestjs/platform-fastify

### Impact

In a NestJS application using `@nestjs/platform-fastify`, GET middleware can be bypassed because Fastify automatically redirects HEAD requests to the corresponding GET handlers (if they exist).

As a result:

- Middleware will be completely skipped. - The HTTP response won't include a body (since the response is truncated when redirecting a HEAD request to a GET handler). - The actual handler will still be executed.

### Patches

Fixed in `@nestjs/platform-fastify@11.1.16`