CVE-2026-25766— Echo 路径遍历漏洞

Echo has a Windows path traversal via backslash in middleware.Static default filesystem

Echo is a Go web framework. In versions 5.0.0 through 5.0.2 on Windows, Echo’s `middleware.Static` using the default filesystem allows path traversal via backslashes, enabling unauthenticated remote file read outside the static root. In `middleware/static.go`, the requested path is unescaped and normalized with `path.Clean` (URL semantics). `path.Clean` does not treat `\` as a path separator, so `..\` sequences remain in the cleaned path. The resulting path is then passed to `currentFS.Open(...)`. When the filesystem is left at the default (nil), Echo uses `defaultFS` which calls `os.Open` (`echo.go:792`). On Windows, `os.Open` treats `\` as a path separator and resolves `..\`, allowing traversal outside the static root. Version 5.0.3 fixes the issue.

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

对路径名的限制不恰当(路径遍历)

Echo 路径遍历漏洞

Echo是Veal98个人开发者的一套前后端不分离的开源社区系统。 Echo 5.0.0版本至5.0.2版本存在路径遍历漏洞，该漏洞源于Windows系统上middleware.Static处理反斜杠不当，可能导致路径遍历和远程文件读取。

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