Prototype pollution in set-in_CVE-2026-26021

{
    "lastseen": "",
    "description": "set-in provides the set value of nested associative structure given array of keys. A prototype pollution vulnerability exists in the the npm package set-in (>=2.0.1, < 2.0.5). Despite a previous fix that attempted to mitigate prototype pollution by checking whether user input contained a forbidden key, it is still possible to pollute Object.prototype via a crafted input using Array.prototype. This has been fixed in version 2.0.5.",
    "published": "2026-02-11T21:18:50.084Z",
    "modified": "2026-02-11T21:18:50.084Z",
    "type": "cve",
    "title": "Prototype pollution in set-in",
    "source": "GitHub_M",
    "references": "https://github.com/ahdinosaur/set-in/security/advisories/GHSA-2c4m-g7rx-63q7\nhttps://github.com/ahdinosaur/set-in/commit/b8e1dabfdbd35c8d604b6324e01d03f280256c3d",
    "id": "CVE-2026-26021",
    "bulletinFamily": "",
    "cwe": [
        "CWE-1321"
    ],
    "cvelist": null,
    "sourceData": "ahdinosaur set-in >= 2.0.1, < 2.0.5",
    "sourceHref": "",
    "cvss": {
        "score": 9.4,
        "severity": "CRITICAL",
        "vector": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H",
        "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": "",
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        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "set-in",
    "version": ">= 2.0.1, < 2.0.5",
    "vendor": "ahdinosaur",
    "ai_description": "Prototype pollution vulnerability in set-in npm package via crafted input using Array.prototype",
    "ai_severity": "Critical",
    "ai_vendor": "ahdinosaur",
    "ai_product": "set-in",
    "ai_version": ">= 2.0.1, < 2.0.5",
    "ai_score": 9.4
}