CVEvulnerability
CVE-2026-82049
8.4 HIGH
Official page ↗
- Status
- Awaiting Analysis
- Published
- 2026-09-14
- Last modified
- 2026-10-11
- Assigner
- [email protected]
- CVSS 4.0 ([email protected])
- 8.4 HIGH — 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/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- Weaknesses
- CWE-59
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.
Related
Weakness · CWE (1)
- CWE-59 Improper Link Resolution Before File Access weakness
References
- https://github.com/python/cpython/commit/197663d63afed27f66e10e23c194e8a634e60913 github.com
- https://github.com/python/cpython/commit/28f315486b3da0352b9a1de1c3c97f4127ba4771 github.com
- https://github.com/python/cpython/commit/5a57248b22ad3b9aafcaaadae2c304a1923daeca github.com
- https://github.com/python/cpython/commit/b38be2e6cf9d989075ab73412c63e003ebad4ff3 github.com
- https://github.com/python/cpython/commit/b8f23e307097552eaea2604383a12ab280520d0d github.com
- https://github.com/python/cpython/commit/c66df4e70435d257fd488b35ea129c6f317433a8 github.com
- https://github.com/python/cpython/commit/cc1689830c6b9aaddded2fb9f2fe8116867e2c0e github.com
- https://github.com/python/cpython/commit/cccc7ec30212dba2abef53ce4a2bed112ddb690c github.com
- https://github.com/python/cpython/issues/157190 github.com
- https://github.com/python/cpython/pull/157191 github.com
- https://mail.python.org/archives/list/[email protected]/thread/EFJWGAZJA56AKSBR2WHMHQZO7RRLZPRH/ mail.python.org
- http://www.openwall.com/lists/oss-security/2026/09/14/27 www.openwall.com