CVE-2026-24895— FrankenPHP affected by Path Confusion via Unicode casing in CGI path splitting allows execution of arbitrary files

FrankenPHP affected by Path Confusion via Unicode casing in CGI path splitting allows execution of arbitrary files

FrankenPHP is a modern application server for PHP. Prior to 1.11.2, FrankenPHP’s CGI path splitting logic improperly handles Unicode characters during case conversion. The logic computes the split index (for finding .php) on a lowercased copy of the request path but applies that byte index to the original path. Because strings.ToLower() in Go can increase the byte length of certain UTF-8 characters (e.g., Ⱥ expands when lowercased), the computed index may not align with the correct position in the original string. This results in an incorrect SCRIPT_NAME and SCRIPT_FILENAME, potentially causing FrankenPHP to execute a file other than the one intended by the URI. This vulnerability is fixed in 1.11.2.

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不正确的行为次序：规范化之前验证

FrankenPHP 安全漏洞

FrankenPHP是phpnet开源的一个PHP应用服务器。 FrankenPHP 1.11.2之前版本存在安全漏洞，该漏洞源于CGI路径分割逻辑在处理Unicode字符时大小写转换不当，可能导致执行非预期URI指定的文件。

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