CVE-2026-33011— Nest Fastify HEAD Request Middleware Bypass
Quick assessment
Affected
nestjs nest
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
nest是nestjs开源的一个 Node.js 框架，用于使用 TypeScript/JavaScript 构建高效、可扩展和企业级的服务器端应用程序。 nest 11.1.15及之前版本存在安全漏洞，该漏洞源于Fastify自动将HEAD请求重定向到GET处理程序，可能导致中间件被完全绕过。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-33011
Vulnerability Information
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Vulnerability Title
Nest Fastify HEAD Request Middleware Bypass
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
控制流实现总是不正确
Source: CVE Program / CVE List V5
Vulnerability Title
nest 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
nest是nestjs开源的一个 Node.js 框架，用于使用 TypeScript/JavaScript 构建高效、可扩展和企业级的服务器端应用程序。 nest 11.1.15及之前版本存在安全漏洞，该漏洞源于Fastify自动将HEAD请求重定向到GET处理程序，可能导致中间件被完全绕过。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-33011
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Patches & Fixes for CVE-2026-33011 (1)
Vendor Advisories for CVE-2026-33011 (1)
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Fastify HEAD Request Middleware Bypass · Advisory · nestjs/nest · GitHub x_refsource_CONFIRM
Vendor Pages for CVE-2026-33011 (1)
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Release v11.1.17 · nestjs/nest · GitHub x_refsource_MISC
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V. Comments for CVE-2026-33011
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