Description
tarfile.tar_filter could be bypassed using crafted link entries, including symlinks with empty or directory-like names, to redirect later archive members outside the intended extraction directory. This allowed a malicious tar archive to cause tarfile.extractall() with filter="tar" to write files outside the destination directory, subject to the permissions of the extracting process.

This is the tarfile.tar_filter counterpart of CVE-2026-7774, which covered tarfile.data_filter.
Published: 2026-10-22
Score: 6.9 Medium
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

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Tracking

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History

Fri, 23 Oct 2026 00:45:00 +0000

Type Values Removed Values Added
Description tarfile.tar_filter could be bypassed using crafted link entries, including symlinks with empty or directory-like names, to redirect later archive members outside the intended extraction directory. This allowed a malicious tar archive to cause tarfile.extractall() with filter="tar" to write files outside the destination directory, subject to the permissions of the extracting process. This is the tarfile.tar_filter counterpart of CVE-2026-7774, which covered tarfile.data_filter.
Title tar filter allows writing outside destination via empty-named symlink
References
Metrics cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N'}

Subscriptions

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cve-icon MITRE

Status: PUBLISHED

Assigner: PSF

Published:

Updated: 2026-10-23T00:36:58.472Z

Reserved: 2026-10-21T18:58:26.985Z

Link: CVE-2026-114583

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-22T21:17:16.543

Modified: 2026-10-23T01:16:53.540

Link: CVE-2026-114583

cve-icon Redhat

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cve-icon OpenCVE Enrichment

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Weaknesses

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