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.

Attack Vector Local

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Python Software Foundation CPython unaffected
Version Status Constraints
0 affected < 3.16.0

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Project Subscriptions

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Advisories

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Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/python/cpython/commit/0901ad4ffb22605f12b705d1c1197f0a01f0ba0b cve-icon cve-icon
https://github.com/python/cpython/commit/c6ada40177436e4e2533a7b252082b5f0c043477 cve-icon cve-icon
https://github.com/python/cpython/commit/e7e0b3523ad6ba8472873dda594cf4021a16f8b5 cve-icon cve-icon
https://github.com/python/cpython/issues/160097 cve-icon cve-icon
https://github.com/python/cpython/pull/160098 cve-icon cve-icon
https://mail.python.org/archives/list/security-announce@python.org/thread/43JOWPRAV5DI3VZ4FUEUAZOHCATXXOCK/ cve-icon cve-icon
History

Fri, 23 Oct 2026 04:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-22

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'}

Projects

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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

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-23T03:45:16Z

Weaknesses