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        "state": "PUBLISHED",
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        "dateReserved": "2025-07-25T14:05:55.899Z",
        "datePublished": "2025-07-28T18:42:44.847Z",
        "dateUpdated": "2026-07-31T14:01:18.178Z"
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                    "product": "CPython",
                    "repo": "https://github.com/python/cpython",
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                            "versionType": "python"
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                    "lang": "en",
                    "type": "reporter",
                    "value": "Alexander Urieles"
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                    "type": "coordinator",
                    "value": "Seth Larson"
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                    "type": "remediation reviewer",
                    "value": "Ethan Furman"
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                    "type": "remediation reviewer",
                    "value": "Steve Dower"
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                            "value": "There is a defect in the CPython “tarfile” module affecting the “TarFile” extraction and entry enumeration APIs. The tar implementation would process tar archives with negative offsets without error, resulting in an infinite loop and deadlock during the parsing of maliciously crafted tar archives. <br><br>This vulnerability can be mitigated by including the following patch after importing the “tarfile” module:&nbsp;<a target=\"_blank\" rel=\"nofollow\" href=\"https://gist.github.com/sethmlarson/1716ac5b82b73dbcbf23ad2eff8b33e1\">https://gist.github.com/sethmlarson/1716ac5b82b73dbcbf23ad2eff8b33e1</a><div><br></div><br>"
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                        "baseScore": 7.5,
                        "baseSeverity": "HIGH",
                        "confidentialityImpact": "NONE",
                        "integrityImpact": "NONE",
                        "privilegesRequired": "NONE",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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                    "tags": [
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                    "url": "https://github.com/python/cpython/issues/130577"
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                    "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/ZULLF3IZ726XP5EY7XJ7YIN3K5MDYR2D/"
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            "source": {
                "discovery": "UNKNOWN"
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            "title": "Tarfile infinite loop during parsing with negative member offset",
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