Python-Multipart affected by Denial of Service via large multipart preamble or epilogue data_CVE-2026-40347

{
    "lastseen": "",
    "description": "Python-Multipart is a streaming multipart parser for Python. Versions prior to 0.0.26 have a denial of service vulnerability when parsing crafted `multipart/form-data` requests with large preamble or epilogue sections. Upgrade to version 0.0.26 or later, which skips ahead to the next boundary candidate when processing leading CR/LF data and immediately discards epilogue data after the closing boundary.",
    "published": "2026-04-17T23:56:50.777Z",
    "modified": "2026-04-17T23:56:50.777Z",
    "type": "cve",
    "title": "Python-Multipart affected by Denial of Service via large multipart preamble or epilogue data",
    "source": "GitHub_M",
    "references": "https://github.com/Kludex/python-multipart/security/advisories/GHSA-mj87-hwqh-73pj\nhttps://github.com/Kludex/python-multipart/releases/tag/0.0.26",
    "id": "CVE-2026-40347",
    "bulletinFamily": "",
    "cwe": [
        "CWE-400",
        "CWE-834"
    ],
    "cvelist": null,
    "sourceData": "Kludex python-multipart < 0.0.26",
    "sourceHref": "",
    "cvss": {
        "score": 5.3,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
        "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": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "python-multipart",
    "version": "< 0.0.26",
    "vendor": "Kludex",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}