CVE-2026-54281: high-severity vulnerability in nestjs nest
Nest: Middleware Bypass on Fastify via Trailing Slash
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.7epss 0.5%
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.
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N
Affected products
nestjs · nestRelated CVEs — nestjs nest
In the same product, most dangerous first.
CVE-2025-54782CRITICAL@nestjs/devtools-integration's CSRF to Sandbox Escape Allows for RCE against JS DevelopersEPSS 47.2%CVE-2026-102281HIGHNest: Remote process termination via a deeply nested microservice message patternEPSS 0.6%CVE-2025-69211MEDIUMNest has a Fastify URL Encoding Middleware Bypass (TOCTOU)EPSS 0.4%CVE-2026-33011HIGHNest Fastify HEAD Request Middleware BypassEPSS 0.4%CVE-2026-40879HIGHNest: DoS via Recursive handleData in JsonSocket (TCP Transport)EPSS 0.3%CVE-2026-35515MEDIUM@nestjs/core Improperly Neutralizes Special Elements in Output Used by a Downstream Component ('Injection')EPSS 0.2%