{"id":"CVE-2026-114583","title":"tar filter allows writing outside destination via empty-named symlink","summary":"tarfile.tar_filter could be bypassed using crafted link entries, including symlinks with empty or directory-like names, to redirect later archive members outside the intended extraction directory. This allowed a malicious tar archive to …","severity":"medium","cvss":6.9,"cvssVector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","cvssSource":"cna","vendor":"Python Software Foundation","product":"CPython","affected":["CPython < 3.16.0"],"published":"2026-10-22","updated":"2026-10-23","sourceUpdated":"2026-10-23T00:36:58.472Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-114583","references":[{"url":"https://github.com/python/cpython/pull/160098"},{"url":"https://github.com/python/cpython/issues/160097"},{"url":"https://mail.python.org/archives/list/security-announce@python.org/thread/43JOWPRAV5DI3VZ4FUEUAZOHCATXXOCK/"},{"url":"https://github.com/python/cpython/commit/0901ad4ffb22605f12b705d1c1197f0a01f0ba0b"},{"url":"https://github.com/python/cpython/commit/c6ada40177436e4e2533a7b252082b5f0c043477"},{"url":"https://github.com/python/cpython/commit/e7e0b3523ad6ba8472873dda594cf4021a16f8b5"}],"tags":["cve.org"],"ingestedAt":"2026-10-22T22:00:50.434Z","slug":"CVE-2026-114583","body":"## Overview\n\ntarfile.tar_filter could be bypassed using crafted link entries, including symlinks with empty or directory-like names, to redirect later archive members outside the intended extraction directory. This allowed a malicious tar archive to cause tarfile.extractall() with filter=\"tar\" to write files outside the destination directory, subject to the permissions of the extracting process.\n\nThis is the tarfile.tar_filter counterpart of CVE-2026-7774, which covered tarfile.data_filter.\n\n## Affected\n\n- `CPython < 3.16.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":38,"depthScoreParts":{"impact":38,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}