CVE-2026-82049
tarfile extraction filters allow file modification and content disclosure via hard link to symlink
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-59 |
| Vendor | python software foundation |
| Product | cpython |
| Published | Sep 14, 2026 |
| Last Updated | Sep 15, 2026 |
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Affected Versions
Python Software Foundation / CPython
0 < 3.14.0b1
References
github.com: https://github.com/python/cpython/commit/5a57248b22ad3b9aafcaaadae2c304a1923daeca github.com: https://github.com/python/cpython/issues/157190 github.com: https://github.com/python/cpython/pull/157191 mail.python.org: https://mail.python.org/archives/list/[email protected]/thread/EFJWGAZJA56AKSBR2WHMHQZO7RRLZPRH/ github.com: https://github.com/python/cpython/commit/b38be2e6cf9d989075ab73412c63e003ebad4ff3 github.com: https://github.com/python/cpython/commit/b8f23e307097552eaea2604383a12ab280520d0d openwall.com: http://www.openwall.com/lists/oss-security/2026/09/14/27
Credits
🔍 Jing Qian (https://github.com/Civitasmass) Stan Ulbrych (https://github.com/StanFromIreland) Petr Viktorin (https://github.com/encukou)