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
- CWE-670 · Always-Incorrect Control Flow Implementation
References
- https://github.com/nestjs/nest/security/advisories/GHSA-wf42-42fg-fg84 ↗
- https://github.com/nestjs/nest/commit/cbdf737cd6e7cefa52d05ecea2ae4af95c464614 ↗
- https://github.com/nestjs/nest/releases/tag/v11.1.17 ↗
- https://nvd.nist.gov/vuln/detail/CVE-2026-33011 ↗
- https://github.com/advisories/GHSA-wf42-42fg-fg84 ↗