shutil.unpack_archive() doesn’t check for Windows absolute paths in ZIPs_CVE-2026-3087

{
    "lastseen": "",
    "description": "If `shutil.unpack_archive()` is given a ZIP archive with an absolute Windows path containing a drive (`C:\\\\...`) then the archive will be extracted outside the target directory which is different than other operating systems. Only Windows is affected by this vulnerability.",
    "published": "2026-04-27T20:46:43.201Z",
    "modified": "2026-04-27T20:50:34.895Z",
    "type": "cve",
    "title": "shutil.unpack_archive() doesn't check for Windows absolute paths in ZIPs",
    "source": "PSF",
    "references": "https://github.com/python/cpython/pull/146591\nhttps://github.com/python/cpython/issues/146581\nhttps://mail.python.org/archives/list/[email protected]/thread/X6FXE5C6KDKOVNX3EC3DWD5RUPFWOZA4/",
    "id": "CVE-2026-3087",
    "bulletinFamily": "",
    "cwe": [
        "CWE-22"
    ],
    "cvelist": null,
    "sourceData": "Python Software Foundation CPython 0",
    "sourceHref": "",
    "cvss": {
        "score": 6,
        "severity": "MEDIUM",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N",
        "version": "4.0"
    },
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        "baseScore": 0,
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    "href": "",
    "category_name": "CVE",
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    "product": "CPython",
    "version": "0",
    "vendor": "Python Software Foundation",
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