Starman versions before 0.4018 for Perl allows HTTP Request Smuggling via Improper Header Precedence_CVE-2026-40560

{
    "lastseen": "",
    "description": "Starman versions before 0.4018 for Perl allows HTTP Request Smuggling via Improper Header Precedence.\n\nStarman incorrectly prioritizes \"Content-Length\" over \"Transfer-Encoding: chunked\" when both headers are present in an HTTP request. Per RFC 7230 3.3.3, Transfer-Encoding must take precedence.\n\nAn attacker could exploit this to smuggle malicious HTTP requests via a front-end reverse proxy.",
    "published": "2026-04-28T23:46:37.780Z",
    "modified": "2026-04-29T13:30:33.198Z",
    "type": "cve",
    "title": "Starman versions before 0.4018 for Perl allows HTTP Request Smuggling via Improper Header Precedence",
    "source": "CPANSec",
    "references": "https://github.com/miyagawa/Starman/commit/ced205f0805027e9d9c0731f8c40b104220604ed.patch\nhttps://metacpan.org/release/MIYAGAWA/Starman-0.4018/changes\nhttps://datatracker.ietf.org/doc/html/rfc7230#section-3.3.3",
    "id": "CVE-2026-40560",
    "bulletinFamily": "",
    "cwe": [
        "CWE-444"
    ],
    "cvelist": null,
    "sourceData": "MIYAGAWA Starman 0",
    "sourceHref": "",
    "cvss": {
        "score": 7.5,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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": "",
            "attackVector": "",
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            "privilegesRequired": "",
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            "confidentialityImpact": "",
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        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Starman",
    "version": "0",
    "vendor": "MIYAGAWA",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
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    "ai_score": 0
}