CVE-2026-82049tarfile extraction filters allow file modification and content disclosure via hard link to symlink
Updated under an hour ago ()
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It affects Python Software Foundation CPython. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 8.4 HIGH (v4.0, CNA)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
- Weakness (CWE)
- CWE-59
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- PSF
- NVD analysis
- Awaiting Analysis
- Record last updated
- Oct 11, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Python Software Foundation CPython python_software_foundation:cpython (from the name) | before 3.10.22; from 3.11.0 before 3.11.17; from 3.12.0 before 3.12.15; from 3.13.0 before 3.13.16; from 3.14.0a1 before 3.14.0b1 | CNA record |
References
- https://github.com/python/cpython/commit/5a57248b22ad3b9aafcaaadae2c304a1923daecapatch
- https://github.com/python/cpython/issues/157190issue-tracking
- https://github.com/python/cpython/pull/157191patch
- https://mail.python.org/archives/list/security-announce@python.org/thread/EFJWGAZJA56AKSBR2WHMHQZO7RRLZPRH/vendor-advisory
- https://github.com/python/cpython/commit/b38be2e6cf9d989075ab73412c63e003ebad4ff3patch
- https://github.com/python/cpython/commit/b8f23e307097552eaea2604383a12ab280520d0dpatch
- https://github.com/python/cpython/commit/197663d63afed27f66e10e23c194e8a634e60913patch
- https://github.com/python/cpython/commit/28f315486b3da0352b9a1de1c3c97f4127ba4771patch
- https://github.com/python/cpython/commit/c66df4e70435d257fd488b35ea129c6f317433a8patch
- https://github.com/python/cpython/commit/cc1689830c6b9aaddded2fb9f2fe8116867e2c0epatch
- https://github.com/python/cpython/commit/cccc7ec30212dba2abef53ce4a2bed112ddb690cpatch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.