{"id":"BIT-libpython-2026-114583","summary":"tar filter allows writing outside destination via empty-named symlink","details":"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.","aliases":["BIT-python-2026-114583","BIT-python-min-2026-114583","CVE-2026-114583","PSF-2026-45"],"modified":"2026-10-29T12:55:57.187328999Z","published":"2026-10-29T12:12:45.267Z","database_specific":{"cpes":["cpe:2.3:a:python:python:*:*:*:*:*:*:*:*"],"severity":"Medium"},"references":[{"type":"WEB","url":"https://github.com/python/cpython/commit/04d8fca7da2cf3ebc0881fec8a53a1330c3b665d"},{"type":"WEB","url":"https://github.com/python/cpython/commit/0901ad4ffb22605f12b705d1c1197f0a01f0ba0b"},{"type":"WEB","url":"https://github.com/python/cpython/commit/bc93f8ad4c4a0f92d184ec8fccc8ff8a651dcec2"},{"type":"WEB","url":"https://github.com/python/cpython/commit/c6ada40177436e4e2533a7b252082b5f0c043477"},{"type":"WEB","url":"https://github.com/python/cpython/commit/e7e0b3523ad6ba8472873dda594cf4021a16f8b5"},{"type":"WEB","url":"https://github.com/python/cpython/commit/f4401da82e2baec5dab06cf070fbca77d53220f0"},{"type":"WEB","url":"https://github.com/python/cpython/issues/160097"},{"type":"WEB","url":"https://github.com/python/cpython/pull/160098"},{"type":"WEB","url":"https://mail.python.org/archives/list/security-announce@python.org/thread/43JOWPRAV5DI3VZ4FUEUAZOHCATXXOCK/"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-114583"}],"affected":[{"package":{"name":"libpython","ecosystem":"Bitnami","purl":"pkg:bitnami/libpython"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.11.18"},{"introduced":"3.12.0"},{"fixed":"3.12.16"},{"introduced":"3.13.0"},{"fixed":"3.13.18"},{"introduced":"3.14.0"},{"fixed":"3.14.10"},{"introduced":"3.15.0"},{"fixed":"3.15.2"},{"introduced":"3.16.0"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/libpython/BIT-libpython-2026-114583.json"},"severity":[{"type":"CVSS_V4","score":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"}]}],"schema_version":"1.9.2"}