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

{
    "lastseen": "",
    "description": "FrankenPHP is a modern application server for PHP. Prior to 1.11.2, FrankenPHP\u2019s 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., \u023a 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.",
    "published": "2026-02-12T19:16:06.618Z",
    "modified": "2026-02-12T19:16:06.618Z",
    "type": "cve",
    "title": "FrankenPHP affected by Path Confusion via Unicode casing in CGI path splitting allows execution of arbitrary files",
    "source": "GitHub_M",
    "references": "https://github.com/php/frankenphp/security/advisories/GHSA-g966-83w7-6w38\nhttps://github.com/php/frankenphp/commit/04fdc0c1e8fde94e2c1ad86217e962c88d27c53e\nhttps://github.com/php/frankenphp/releases/tag/v1.11.2",
    "id": "CVE-2026-24895",
    "bulletinFamily": "",
    "cwe": [
        "CWE-180"
    ],
    "cvelist": null,
    "sourceData": "php frankenphp < 1.11.2",
    "sourceHref": "",
    "cvss": {
        "score": 8.9,
        "severity": "HIGH",
        "vector": "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",
        "version": "4.0"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "frankenphp",
    "version": "< 1.11.2",
    "vendor": "php",
    "ai_description": "Path confusion vulnerability via Unicode casing in CGI path splitting, potentially allowing execution of arbitrary files",
    "ai_severity": "High",
    "ai_vendor": "The PHP Group",
    "ai_product": "FrankenPHP",
    "ai_version": "< 1.11.2",
    "ai_score": 8.9
}