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CVE-2026-82049 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

No CVSS 3.x data is available for this CVE.

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
http://www.openwall.com/lists/oss-security/2026/09/14/27	CVE
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/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]

see all 7 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-59	Improper Link Resolution Before File Access ('Link Following')	[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

6 change records found show changes

Date	Action	Recorded By
Sep 16, 2026	CVE Modified	CISA-ADP
Sep 15, 2026	CVE Modified	[email protected]
Sep 14, 2026	CVE Modified	[email protected]
Sep 14, 2026	CVE Modified	CISA-ADP
Sep 14, 2026	CVE Modified	CVE
Sep 14, 2026	New CVE Received	[email protected]