{"id":"CVE-2026-82049","title":"In CPython 3.13 and earlier, the tarfile module's data and tar extraction filters are vulnerable to crafted archives containing a hard link to a symbolic link","summary":"In CPython 3.13 and earlier, the tarfile module's data and tar extraction filters are vulnerable to crafted archives containing a hard link to a symbolic link. Such archives may cause extraction to modify the permissions or modification …","severity":"high","cvss":8.4,"cvssVector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","cwe":["CWE-59"],"vendor":"Python Software Foundation","product":"CPython","affected":["CPython < 3.14.0b1"],"published":"2026-09-14","updated":"2026-09-16","sourceUpdated":"2026-09-16T19:42:12.090","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-82049","references":[{"url":"https://github.com/python/cpython/commit/5a57248b22ad3b9aafcaaadae2c304a1923daeca","label":"cna@python.org"},{"url":"https://github.com/python/cpython/commit/b38be2e6cf9d989075ab73412c63e003ebad4ff3","label":"cna@python.org"},{"url":"https://github.com/python/cpython/commit/b8f23e307097552eaea2604383a12ab280520d0d","label":"cna@python.org"},{"url":"https://github.com/python/cpython/issues/157190","label":"cna@python.org"},{"url":"https://github.com/python/cpython/pull/157191","label":"cna@python.org"},{"url":"https://mail.python.org/archives/list/security-announce@python.org/thread/EFJWGAZJA56AKSBR2WHMHQZO7RRLZPRH/","label":"cna@python.org"},{"url":"http://www.openwall.com/lists/oss-security/2026/09/14/27","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-82049.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-82049"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2533296"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-82049"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-82049"},{"url":"https://access.redhat.com/errata/RHSA-2026:65505"},{"url":"https://access.redhat.com/errata/RHSA-2026:68132"},{"url":"https://access.redhat.com/errata/RHSA-2026:68135"},{"url":"https://access.redhat.com/errata/RHSA-2026:68154"},{"url":"https://access.redhat.com/errata/RHSA-2026:68309"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00182,"epssPercentile":0.07991,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-09-15T00:00:00+00:00"},"cvssSource":"cna","scores":{"cna":8.4,"vendor":7.1},"ingestedAt":"2026-09-14T20:14:21.139Z","patched":["hardened_images"],"slug":"CVE-2026-82049","body":"## Overview\n\nIn CPython 3.13 and earlier, the tarfile module's data and tar extraction filters are vulnerable to crafted archives containing a hard link to a symbolic link. Such archives may cause extraction to modify the permissions or modification time of a file outside the destination directory, or expose the contents of that file within the extracted tree.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Important · affected: Red Hat Hardened Images · no fix planned: Red Hat Hardened Images · updated 2026-09-15 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-82049.json)\n- **RHSA-2026:65505** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-09-08 · [advisory](https://access.redhat.com/errata/RHSA-2026:65505)\n- **RHSA-2026:68132** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-09-16 · [advisory](https://access.redhat.com/errata/RHSA-2026:68132)\n- **RHSA-2026:68135** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-09-16 · [advisory](https://access.redhat.com/errata/RHSA-2026:68135)\n- **RHSA-2026:68154** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-09-16 · [advisory](https://access.redhat.com/errata/RHSA-2026:68154)\n- **RHSA-2026:68309** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-09-16 · [advisory](https://access.redhat.com/errata/RHSA-2026:68309)","depth":"twilight","depthScore":46,"depthScoreParts":{"impact":46.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}