{"id":"CVE-2026-114583","aliases":[],"title":"tar filter allows writing outside destination via empty-named symlink","titleSource":"PSF","descriptionSource":"PSF","products":[{"vendor":"Python Software Foundation","name":"CPython","platforms":[],"versions":[{"version":"0","status":"affected","lessThan":"3.11.18","versionType":"python"},{"version":"3.12.0","status":"affected","lessThan":"3.12.16","versionType":"python"},{"version":"3.13.0","status":"affected","lessThan":"3.13.18","versionType":"python"},{"version":"3.14.0","status":"affected","lessThan":"3.14.10","versionType":"python"},{"version":"3.15.0","status":"affected","lessThan":"3.15.2","versionType":"python"},{"version":"3.16.0a1","status":"affected","lessThan":"3.16.0","versionType":"python"}],"defaultStatus":"unaffected","source":"PSF","url":"https://www.cve.org/CVERecord?id=CVE-2026-114583"}],"remediation":[],"description":"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 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.","severity":"medium","score":6.9,"published":"2026-10-22T20:57:36.019Z","modified":"2026-10-27T00:36:15.766Z","withdrawn":false,"knownExploited":false,"affected":[],"references":["https://github.com/python/cpython/pull/160098","https://github.com/python/cpython/issues/160097","https://mail.python.org/archives/list/security-announce@python.org/thread/43JOWPRAV5DI3VZ4FUEUAZOHCATXXOCK/","https://github.com/python/cpython/commit/0901ad4ffb22605f12b705d1c1197f0a01f0ba0b","https://github.com/python/cpython/commit/c6ada40177436e4e2533a7b252082b5f0c043477","https://github.com/python/cpython/commit/e7e0b3523ad6ba8472873dda594cf4021a16f8b5","https://github.com/python/cpython/commit/04d8fca7da2cf3ebc0881fec8a53a1330c3b665d","https://github.com/python/cpython/commit/bc93f8ad4c4a0f92d184ec8fccc8ff8a651dcec2","https://github.com/python/cpython/commit/f4401da82e2baec5dab06cf070fbca77d53220f0"],"sources":[{"name":"CVE","id":"CVE-2026-114583","modified":"2026-10-27T00:36:15.766Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-114583"}],"assessments":[{"source":"PSF","vector":"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","score":6.9}],"sourceAffected":[],"kev":{"status":"not-listed","checkedAt":"2026-10-28T21:40:30.742Z"},"coverage":[{"source":"NVD","status":"not-checked"},{"source":"GHSA","status":"not-checked"},{"source":"EUVD","status":"not-checked"},{"source":"EPSS","status":"not-checked"}],"evidence":[]}