Nest: Middleware Bypass on Fastify via Trailing Slash

Impact An authentication bypass vulnerability exists in @nestjs/platform-fastify confirmed on version 11.1.24, the latest available release at time of report. When middleware is registered through NestJS's MiddlewareConsumer.forRoutes API on the Fastify adapter, an unauthenticated client can bypa...

CVE-2026-33011 Nest Fastify HEAD Request Middleware Bypass

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...

CVE-2026-33011

CVE-2026-33011 affects Nest with @nestjs/platform-fastify: in versions 11.1.15 and earlier, Fastify’s HEAD-to-GET redirect can bypass GET middleware, causing middleware to be skipped while the GET handler still runs and the response lacks a body. The issue is fixed in version 11.1.16. Remediate b...

PT-2026-25990

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...

CVE-2026-2880

A vulnerability in @fastify/middie versions 9.2.0 can result in authentication/authorization bypass when using path-scoped middleware for example, app.use'/secret', auth. When Fastify router normalization options are enabled such as ignoreDuplicateSlashes, useSemicolonDelimiter, and related...

CVE-2025-69211

CVE-2025-69211 affects Nest.js applications using the Fastify platform integration before version 11.1.11. The issue is a bypass in the Fastify URL encoding middleware that can skip security checks implemented via NestMiddleware (via MiddlewareConsumer) or app.use(), particularly when middleware ...