CVE-2026-33807— @fastify/express 安全漏洞

@fastify/express vulnerable to middleware path doubling causing authentication bypass in child plugin scopes

@fastify/express v4.0.4 and earlier contains a path handling bug in the onRegister function that causes middleware paths to be doubled when inherited by child plugins. When a child plugin is registered with a prefix that matches a middleware path, the middleware path is prefixed a second time, causing it to never match incoming requests. This results in complete bypass of Express middleware security controls, including authentication, authorization, and rate limiting, for all routes defined within affected child plugin scopes. No special configuration or request crafting is required. Upgrade to @fastify/express v4.0.5 or later.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

解释冲突

@fastify/express 安全漏洞

@fastify/express是Fastify开源的一个兼容性插件。 @fastify/express 4.0.4及之前版本存在安全漏洞，该漏洞源于onRegister函数中的路径处理错误导致中间件路径在被子插件继承时被重复添加，可能导致完全绕过Express中间件安全控制。

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