CVE-2026-90982— Fastify/static 路由保护绕过漏洞
一分钟漏洞结论
影响对象
@fastify/static @fastify/static
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。
是一个 Fastify 插件，用于从配置的根目录提供静态文件服务。在 10.1.4 之前的版本中，在大小写不敏感的文件系统（如 Windows 或 macOS 的默认卷）上，通过更改路径片段的大小写，可以绕过路由守卫（route guard）或 allowedPath 限制。由于路由匹配器是大小写敏感的，而文件系统是大小写不敏感的，因此更改受保护片段大小写的请求不会匹配到受守卫的路由，从而“落”到静态文件处理器，但文件系统仍会将其解析为同一个受保护文件。结果是，未认证的请求能够读取本应由路由守卫或 allowedP
可能的 ATT&CK 技术 1 AI
T1079
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一、 漏洞 CVE-2026-90982 基础信息
漏洞信息
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Vulnerability Title
@fastify/static vulnerable to route guard bypass via path case-folding
来源: CVE Program / CVE List V5
Vulnerability Description
@fastify/static is a Fastify plugin that serves static files from a configured root directory. In versions before 10.1.4, on a case-insensitive filesystem such as Windows or the default macOS volume, a route guard or allowedPath restriction can be bypassed by altering the letter case of a path segment. The route matcher is case-sensitive while the filesystem is not, so a request that changes the case of a protected segment does not match the guarded route and falls through to the static handler, yet the filesystem resolves it to the same protected file. As a result, an unauthenticated request can read a file that a route guard or allowedPath was configured to protect. The issue does not affect case-sensitive filesystems and is not a directory traversal, since nothing is served from outside the configured root. The issue is fixed in @fastify/static 10.1.4, which validates the requested path against its actual on-disk spelling and rejects case-aliased paths before authorization. As a workaround, serve static files from a case-sensitive filesystem, or ensure route guards and allowedPath rules account for every letter-case variant of the protected paths.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
来源: CVE Program / CVE List V5
Vulnerability Type
大小写敏感处理不恰当
来源: CVE Program / CVE List V5
受影响产品
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| @fastify/static | @fastify/static | 0 ~ 10.1.4 | - |
|
二、漏洞 CVE-2026-90982 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-90982 厂商安全公告 (1)
IV. Related Vulnerabilities
V. Comments for CVE-2026-90982
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