High severityNVD Advisory· Published Mar 20, 2026· Updated Mar 20, 2026
Nest Fastify HEAD Request Middleware Bypass
CVE-2026-33011
Description
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
@nestjs/platform-fastifynpm | < 11.1.16 | 11.1.16 |
Affected products
2Patches
Vulnerability mechanics
References
5- github.com/advisories/GHSA-wf42-42fg-fg84ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-33011ghsaADVISORY
- github.com/nestjs/nest/commit/cbdf737cd6e7cefa52d05ecea2ae4af95c464614ghsax_refsource_MISCWEB
- github.com/nestjs/nest/releases/tag/v11.1.17ghsax_refsource_MISCWEB
- github.com/nestjs/nest/security/advisories/GHSA-wf42-42fg-fg84ghsax_refsource_CONFIRMWEB
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