CVE-2026-117531— fastify/multipart 拒绝服务漏洞
一分钟漏洞结论
影响对象
@fastify/multipart @fastify/multipart
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
是 Fastify Web 框架的多部分表单数据（multipart form-data）和文件上传插件。在 5.3.0 至 10.1.6 版本中，当请求体在文件部分内部结束且缺少结束边界（closing boundary）时，即使 Content-Length 已完整、客户端未中断连接且未超出文件大小限制，该插件也不会将解析错误传播到文件流。相反，插件会直接销毁正在进行的文件流且不抛出错误。因此，任何在遍历请求各部分后、在消费文件之前执行异步操作的处理器，将会绑定到一个既不会发出错误事件也不会发出结束事件的流上，
可能的 ATT&CK 技术 1 AI
T1499 · Endpoint Denial of Service
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一、 漏洞 CVE-2026-117531 基础信息
漏洞信息
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Vulnerability Title
@fastify/multipart vulnerable to Denial of Service via a malformed upload hanging delayed file consumers
来源: CVE Program / CVE List V5
Vulnerability Description
@fastify/multipart is the multipart form-data and file upload plugin for the Fastify web framework. In versions 5.3.0 through 10.1.6, the plugin does not propagate a parser error to the file stream when a request body ends inside a file part with no closing boundary, even though the Content-Length is complete, the client does not abort, and no file size limit is exceeded. The plugin destroys the in-progress file stream without an error, so a handler that iterates the request parts and performs asynchronous work before consuming the file attaches to a stream that never emits an error or end event, and the request never responds while the connection stays open. An unauthenticated remote client can repeat these malformed uploads against such a route to accumulate pending connections and exhaust server resources, so the impact is availability only and exploitation depends on the application using a delayed file consumer. The issue is fixed in @fastify/multipart 10.1.7, where the parser error is propagated to the file stream so a delayed consumer settles with an error instead of hanging, and users should upgrade to 10.1.7 or later. There is no workaround other than upgrading.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
来源: CVE Program / CVE List V5
受影响产品
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| @fastify/multipart | @fastify/multipart | 5.3.0 ~ 10.1.7 | - |
|
二、漏洞 CVE-2026-117531 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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