In the Tarfile.extract() function, the filter parameter is not passed properly when extracting hardlinks. An affected system that extracts content from untrusted tar files could end up writing files with an unexpected uid/gid despite the user passing filter='data' to the extract() function.

Attack Vector Network

Attack Complexity Low

Privileges Required High

Attack Requirements Present

User Interaction Passive

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact Low

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.

Exploitation none

Automatable no

Technical Impact partial

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 < 3.15.0

No data.

No data.

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Project Subscriptions

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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/python/cpython/commit/5e0ef3f1afe892e4f64eb83368db57ac4c40cba0 cve-icon
https://github.com/python/cpython/commit/7b57e8d51446297b8c7c482d224bc5f1938e4301 cve-icon
https://github.com/python/cpython/commit/7ccdbaba2c54250a70d7f25632152df7655a5e0a cve-icon
https://github.com/python/cpython/commit/eee3ddf0ca10283cc7fea724aae9cd8665f8d15e cve-icon
https://github.com/python/cpython/issues/151987 cve-icon
https://github.com/python/cpython/pull/151988 cve-icon
https://mail.python.org/archives/list/security-announce@python.org/thread/TWZW2PC2AZOV6FENIHFSRC63OM7MBGSB/ cve-icon
History

Tue, 30 Jun 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

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

Tue, 30 Jun 2026 16:00:00 +0000

Type Values Removed Values Added
References

Tue, 30 Jun 2026 15:00:00 +0000

Type Values Removed Values Added
Description In the Tarfile.extract() function, the filter parameter is not passed properly when extracting hardlinks. An affected system that extracts content from untrusted tar files could end up writing files with an unexpected uid/gid despite the user passing filter='data' to the extract() function.
Title Tarfile.extract() doesn't fully respect filter parameter
Weaknesses CWE-281
References
Metrics cvssV4_0

{'score': 2, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: PSF

Published:

Updated: 2026-06-30T15:28:30.201Z

Reserved: 2026-03-17T19:25:46.527Z

Link: CVE-2026-4360

cve-icon Vulnrichment

Updated: 2026-06-30T15:28:27.269Z

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-30T16:30:16Z

Weaknesses