high8.4
CVE-2026-82049
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.
Impact
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.
Affected packages
This record carries no package version data, so it cannot be matched against a dependency list automatically. Read the advisory and compare your version by hand.
Weakness classification
References
- NVD record
- CVE.org record
- https://github.com/python/cpython/commit/197663d63afed27f66e10e23c194e8a634e60913
- https://github.com/python/cpython/commit/28f315486b3da0352b9a1de1c3c97f4127ba4771
- https://github.com/python/cpython/commit/5a57248b22ad3b9aafcaaadae2c304a1923daeca
- https://github.com/python/cpython/commit/b38be2e6cf9d989075ab73412c63e003ebad4ff3
- https://github.com/python/cpython/commit/b8f23e307097552eaea2604383a12ab280520d0d
- https://github.com/python/cpython/commit/c66df4e70435d257fd488b35ea129c6f317433a8
- https://github.com/python/cpython/commit/cc1689830c6b9aaddded2fb9f2fe8116867e2c0e
- https://github.com/python/cpython/commit/cccc7ec30212dba2abef53ce4a2bed112ddb690c
- https://github.com/python/cpython/issues/157190
- https://github.com/python/cpython/pull/157191
- https://mail.python.org/archives/list/security-announce@python.org/thread/EFJWGAZJA56AKSBR2WHMHQZO7RRLZPRH/
- http://www.openwall.com/lists/oss-security/2026/09/14/27