tarfile opened in streaming mode mishandles EOF_CVE-2026-11972

{
    "lastseen": "",
    "description": "When using the \"tarfile\" module with a file opened in \"streaming mode\" (mode=\"r|\") the tarfile module did not properly handle EOF, meaning an archive could be parsed in an infinite loop.",
    "published": "2026-06-23T22:02:45.434Z",
    "modified": "2026-06-23T22:02:45.434Z",
    "type": "cve",
    "title": "tarfile opened in streaming mode mishandles EOF",
    "source": "PSF",
    "references": "https://github.com/python/cpython/issues/151981\nhttps://github.com/python/cpython/pull/151982\nhttps://mail.python.org/archives/list/[email protected]/thread/AXPSKKTSRKXTTJULW3XSIC74WZNAAPPB/",
    "id": "CVE-2026-11972",
    "bulletinFamily": "",
    "cwe": [
        "CWE-252",
        "CWE-606",
        "CWE-770"
    ],
    "cvelist": null,
    "sourceData": "Python Software Foundation CPython 0",
    "sourceHref": "",
    "cvss": {
        "score": 8.2,
        "severity": "HIGH",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
        "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": "",
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            "privilegesRequired": "",
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            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "CPython",
    "version": "0",
    "vendor": "Python Software Foundation",
    "ai_description": "",
    "ai_severity": "",
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    "ai_score": 0
}