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.
Published: 2026-09-14
Score: 8.4 High
EPSS: n/a
KEV: No
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Remediation

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History

Mon, 14 Sep 2026 21:00:00 +0000

Type Values Removed Values Added
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.
Title tarfile extraction filters allow file modification and content disclosure via hard link to symlink
Weaknesses CWE-59
References
Metrics cvssV4_0

{'score': 8.4, 'vector': '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'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Subscriptions

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cve-icon MITRE

Status: PUBLISHED

Assigner: PSF

Published:

Updated: 2026-09-14T20:07:50.158Z

Reserved: 2026-08-27T22:23:05.514Z

Link: CVE-2026-82049

cve-icon Vulnrichment

Updated: 2026-09-14T19:42:47.686Z

cve-icon NVD

Status : Received

Published: 2026-09-14T19:17:50.927

Modified: 2026-09-14T20:16:54.233

Link: CVE-2026-82049

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses