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OpenAdvisories
High · 8.7 CVE-2026-33011 EUVD-2026-13549GHSA-wf42-42fg-fg84

Nest Fastify HEAD Request Middleware Bypass

Published Mar 20, 2026 · Updated Mar 20, 2026 · Assigned by GitHub_M

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.

Affected products

VendorProductAffectedFixed
nestjs nest < 11.1.16 —

Affected packages

EcosystemPackageAffectedFixedRecord
npm @nestjs/platform-fastify < 11.1.16 11.1.16 GHSA-wf42-42fg-fg84

References