In hyper-staticfile in Rust prior to 0.9.2, an improper validation of Windows paths could lead to directory traversal attack. The path resolution didn't correctly validate Windows paths meaning paths like /foo/bar/c:/windows/web/screen/img101.png would be allowed and respond with the contents of c:/windows/web/screen/img101.png. Thus users could potentially read files anywhere on the filesystem. This only impacts Windows. Linux and other unix likes are not impacted by this.