nestjs/nest · Security

Nest Fastify HEAD Request Middleware Bypass

GHSA ID
GHSA-wf42-42fg-fg84
CVE ID
CVE-2026-33011
Severity
high
Published
Updated
CVSS v4
8.7 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

Description

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/[email protected]

CWEs

References