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...

PT-2026-49595

Name of the Vulnerable Software and Affected Versions @nestjs/platform-fastify versions prior to 11.1.24 Description An authentication bypass exists in the Fastify adapter when middleware is registered through the MiddlewareConsumer.forRoutes API. An unauthenticated client can bypass registered...