Description
When tarfile extracts a link on a system that doesn't support links, it falls back to extracting a member from the archive. In this case, the filter function is run twice: once for the extracted member, and once with name set to the location of the link. For one of the calls, the return value was ignored. Instead, the member should be skipped if either call returns None.
Published: 2026-09-11
Score: 5.7 Medium
EPSS: n/a
KEV: No
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Remediation

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History

Fri, 11 Sep 2026 23:45:00 +0000

Type Values Removed Values Added
Description When tarfile extracts a link on a system that doesn't support links, it falls back to extracting a member from the archive. In this case, the filter function is run twice: once for the extracted member, and once with name set to the location of the link. For one of the calls, the return value was ignored. Instead, the member should be skipped if either call returns None.
Title tarfile hardlink fallback ignores custom extraction filter rejection via None
Weaknesses CWE-22
CWE-59
References
Metrics cvssV4_0

{'score': 5.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N'}

ssvc

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


Subscriptions

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cve-icon MITRE

Status: PUBLISHED

Assigner: PSF

Published:

Updated: 2026-09-12T00:31:42.680Z

Reserved: 2026-09-09T15:11:08.270Z

Link: CVE-2026-87910

cve-icon Vulnrichment

Updated: 2026-09-11T21:07:14.642Z

cve-icon NVD

Status : Received

Published: 2026-09-11T18:16:59.800

Modified: 2026-09-11T21:17:50.887

Link: CVE-2026-87910

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses