CVE-2026-82049CWE-59

CVE-2026-82049

published September 14, 2026

CVSS
8.4
EPSS
0%
Percentile
7.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS
8.4 · NONE
CVSS v4.0
8.4 · 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
EPSS
0.00188 · 7.9th percentile
Weakness
CWE-59 · Improper Link Resolution Before File Access ('Link Following')
Published
2026-09-14T23:17Z
References (12)
https://github.com/python/cpython/commit/197663d63afed27f66e10e23c194e8a634e60913 · [email protected]https://github.com/python/cpython/commit/28f315486b3da0352b9a1de1c3c97f4127ba4771 · [email protected]https://github.com/python/cpython/commit/5a57248b22ad3b9aafcaaadae2c304a1923daeca · [email protected]https://github.com/python/cpython/commit/b38be2e6cf9d989075ab73412c63e003ebad4ff3 · [email protected]https://github.com/python/cpython/commit/b8f23e307097552eaea2604383a12ab280520d0d · [email protected]https://github.com/python/cpython/commit/c66df4e70435d257fd488b35ea129c6f317433a8 · [email protected]https://github.com/python/cpython/commit/cc1689830c6b9aaddded2fb9f2fe8116867e2c0e · [email protected]https://github.com/python/cpython/commit/cccc7ec30212dba2abef53ce4a2bed112ddb690c · [email protected]https://github.com/python/cpython/issues/157190 · [email protected]https://github.com/python/cpython/pull/157191 · [email protected]https://mail.python.org/archives/list/[email protected]/thread/EFJWGAZJA56AKSBR2WHMHQZO7RRLZPRH/ · [email protected]http://www.openwall.com/lists/oss-security/2026/09/14/27 · af854a3a-2127-422b-91ae-364da2661108
EPSS history
Timeline
  • 17 SEP 03:32Z
    EPSS moved — → 0%
    epss
  • 14 SEP 19:14Z
    tarfile extraction filters allow file modification and content disclosure via hard link to symlink
    cvelistv5