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

CVE ID : CVE-2026-24895

Published : Feb. 12, 2026, 7:16 p.m. | 1 hour, 11 minutes ago

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.

Severity: 0.0 | NA

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