CVE-2026-24895
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.
- Score
- CVSS 3.1 9.8 Critical
- Status
- Analyzed - security-advisories@github.com
- Published
- 2026-02-12
- Last modified
- 2026-02-12
- Weaknesses
- CWE-180
Affected products
References
- https://github.com/php/frankenphp/commit/04fdc0c1e8fde94e2c1ad86217e962c88d27c53e
- https://github.com/php/frankenphp/releases/tag/v1.11.2
- https://github.com/php/frankenphp/security/advisories/GHSA-g966-83w7-6w38
