CVE-2026-24895— FrankenPHP affected by Path Confusion via Unicode casing in CGI path splitting allows execution of arbitrary files
Quick assessment
Affected
php frankenphp
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
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。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-24895
Vulnerability Information
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Vulnerability Title
FrankenPHP affected by Path Confusion via Unicode casing in CGI path splitting allows execution of arbitrary files
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
Source: CVE Program / CVE List V5
Vulnerability Type
不正确的行为次序：规范化之前验证
Source: CVE Program / CVE List V5
Vulnerability Title
FrankenPHP 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
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。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| php | frankenphp | < 1.11.2 | - |
|
II. Public POCs for CVE-2026-24895
| # | POC Description | Source Link | Shenlong Link |
|---|
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V. Comments for CVE-2026-24895
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