{"id":"CVE-2026-82049","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-82049","generatedAt":"2026-10-28T03:58:03.165Z","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.","description":"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 time of a file outside the destination directory, or expose the contents of that file within the extracted tree.","published":"2026-09-14T19:17:51.000Z","lastModified":"2026-10-11T01:16:26.000Z","status":"Awaiting Analysis","sourceIdentifier":"cna@python.org","cvss":{"version":"4.0","score":8.4,"severity":"HIGH","vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-59"],"affected":[],"epss":{"score":0.00188,"percentile":0.083,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.19%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://github.com/python/cpython/commit/197663d63afed27f66e10e23c194e8a634e60913","source":"cna@python.org"},{"url":"https://github.com/python/cpython/commit/28f315486b3da0352b9a1de1c3c97f4127ba4771","source":"cna@python.org"},{"url":"https://github.com/python/cpython/commit/5a57248b22ad3b9aafcaaadae2c304a1923daeca","source":"cna@python.org"},{"url":"https://github.com/python/cpython/commit/b38be2e6cf9d989075ab73412c63e003ebad4ff3","source":"cna@python.org"},{"url":"https://github.com/python/cpython/commit/b8f23e307097552eaea2604383a12ab280520d0d","source":"cna@python.org"},{"url":"https://github.com/python/cpython/commit/c66df4e70435d257fd488b35ea129c6f317433a8","source":"cna@python.org"},{"url":"https://github.com/python/cpython/commit/cc1689830c6b9aaddded2fb9f2fe8116867e2c0e","source":"cna@python.org"},{"url":"https://github.com/python/cpython/commit/cccc7ec30212dba2abef53ce4a2bed112ddb690c","source":"cna@python.org"},{"url":"https://github.com/python/cpython/issues/157190","source":"cna@python.org"},{"url":"https://github.com/python/cpython/pull/157191","source":"cna@python.org"},{"url":"https://mail.python.org/archives/list/security-announce@python.org/thread/EFJWGAZJA56AKSBR2WHMHQZO7RRLZPRH/","source":"cna@python.org"},{"url":"http://www.openwall.com/lists/oss-security/2026/09/14/27","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-82049","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}