Flight: Reflected XSS via unvalidated JSONP callback in Flight::jsonp()_CVE-2026-42548

{
    "lastseen": "",
    "description": "Flight is an extensible micro-framework for PHP. Prior to 3.18.1, Flight::jsonp() concatenates the ?jsonp= query parameter directly into an application/javascript response body without validating that the value is a legal JavaScript identifier. An attacker can inject arbitrary JavaScript that executes in the response origin, enabling reflected cross-site scripting. This vulnerability is fixed in 3.18.1.",
    "published": "2026-05-13T19:21:44.125Z",
    "modified": "2026-05-13T19:21:44.125Z",
    "type": "cve",
    "title": "Flight: Reflected XSS via unvalidated JSONP callback in Flight::jsonp()",
    "source": "GitHub_M",
    "references": "https://github.com/flightphp/core/security/advisories/GHSA-fcx8-ph5r-mxr4",
    "id": "CVE-2026-42548",
    "bulletinFamily": "",
    "cwe": [
        "CWE-79"
    ],
    "cvelist": null,
    "sourceData": "flightphp core < 3.18.1",
    "sourceHref": "",
    "cvss": {
        "score": 8.6,
        "severity": "HIGH",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N",
        "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": "core",
    "version": "< 3.18.1",
    "vendor": "flightphp",
    "ai_description": "Reflected cross-site scripting vulnerability via unvalidated JSONP callback in Flight::jsonp()",
    "ai_severity": "High",
    "ai_vendor": "FlightPHP",
    "ai_product": "Flight",
    "ai_version": "< 3.18.1",
    "ai_score": 8.6
}