CVE-2026-54281: Nestjs Nest

High severity, CVSS 8.7. EPSS: 0.5% chance of exploitation in the next 30 days.

Nest is a framework for building scalable Node.js server-side applications. Prior to 11.1.24, an authentication bypass vulnerability exists in @nestjs/platform-fastify. When middleware is registered through NestJS's MiddlewareConsumer.forRoutes() API on the Fastify adapter, an unauthenticated client can bypass the Nest middleware registered for that route by simply appending a trailing slash (/) to the request URL. This bypass works on the default Fastify adapter configuration. This vulnerability is fixed in 11.1.24.

Affected products

• Nestjs Nest: before 11.1.24 (fixed in 11.1.24)

Published 2026-06-22. Last modified 2026-06-24.