multiparty vulnerable to Denial of Service via Prototype Pollution leading to Uncaught Exception_CVE-2026-8161

{
    "lastseen": "",
    "description": "[email protected] and lower versions are vulnerable to denial of service via uncaught exception. By sending a multipart/form-data request with a field name that collides with an inherited Object.prototype property such as __proto__, constructor, or toString, the parser invokes .push() on the inherited prototype value rather than an array, throwing a TypeError that propagates as an uncaught exception and crashes the process. Impact: any service accepting multipart uploads via multiparty is affected. Workarounds: none. Upgrade to [email protected] or higher.",
    "published": "2026-05-12T08:50:37.685Z",
    "modified": "2026-05-12T08:50:37.685Z",
    "type": "cve",
    "title": "multiparty vulnerable to Denial of Service via Prototype Pollution leading to Uncaught Exception",
    "source": "openjs",
    "references": "https://github.com/pillarjs/multiparty/security/advisories/GHSA-qxch-whhj-8956\nhttps://cna.openjsf.org/security-advisories.html",
    "id": "CVE-2026-8161",
    "bulletinFamily": "",
    "cwe": [
        "CWE-248",
        "CWE-1321"
    ],
    "cvelist": null,
    "sourceData": "multiparty multiparty 0",
    "sourceHref": "",
    "cvss": {
        "score": 7.5,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
        "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": "multiparty",
    "version": "0",
    "vendor": "multiparty",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}