CVE-2026-82049

tarfile extraction filters allow file modification and content disclosure via hard link to symlink

Published Sep 14, 2026 CVSS 4.0 · 8.4 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
References
Metrics threat_severity

None

cvssV3_1

{'score': 7.1, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N'}

threat_severity

Important

Type Values Removed Values Added
First Time appeared Python
Python cpython
Vendors & Products Python
Python cpython
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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
PSF
Published
Updated
Oct 11, 2026, 12:39 AM
Reserved
Aug 27, 2026, 10:23 PM
Status
Awaiting Analysis
Published
Sep 14, 2026, 7:17 PM
Modified
Oct 11, 2026, 1:16 AM
Severity
Important
Public date
Sep 14, 2026, 7:14 PM