Flight: HTTP method override enabled by default enables CSRF escalation and middleware bypass in flightphp/core_CVE-2026-42551

{
    "lastseen": "",
    "description": "Flight is an extensible micro-framework for PHP. Prior to 3.18.1, Request::getMethod() unconditionally honors the X-HTTP-Method-Override header and the $_REQUEST['_method'] parameter on any HTTP verb (including safe verbs such as GET), with no opt-in and no whitelist of permitted target methods. A GET request can silently become a DELETE or PUT, enabling CSRF escalation against destructive endpoints, bypass of middleware gated on unsafe verbs, and cache poisoning between CDN and origin. This vulnerability is fixed in 3.18.1.",
    "published": "2026-05-13T19:23:27.314Z",
    "modified": "2026-05-13T19:23:27.314Z",
    "type": "cve",
    "title": "Flight: HTTP method override enabled by default enables CSRF escalation and middleware bypass in flightphp/core",
    "source": "GitHub_M",
    "references": "https://github.com/flightphp/core/security/advisories/GHSA-vxrr-w42w-w76g",
    "id": "CVE-2026-42551",
    "bulletinFamily": "",
    "cwe": [
        "CWE-436"
    ],
    "cvelist": null,
    "sourceData": "flightphp core < 3.18.1",
    "sourceHref": "",
    "cvss": {
        "score": 7.5,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
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            "privilegesRequired": "",
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            "confidentialityImpact": "",
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            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "core",
    "version": "< 3.18.1",
    "vendor": "flightphp",
    "ai_description": "",
    "ai_severity": "",
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    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}