CVE-2026-4360

LOW

Python Software Foundation CPython - Tarfile.extract() Doesn't Fully Respect Filter Parameter

Title source: rule

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.

References (7)

Core 7

Core References

Vendor Advisory vendor-advisory

https://mail.python.org/archives/list/[email protected]/thread/TWZW2PC2AZOV6FENIHFSRC63OM7MBGSB/

Patch patch

https://github.com/python/cpython/pull/151988

Issue Tracking issue-tracking

https://github.com/python/cpython/issues/151987

Patch patch

https://github.com/python/cpython/commit/5e0ef3f1afe892e4f64eb83368db57ac4c40cba0

View Patch ZIP pw:eip

Patch patch

https://github.com/python/cpython/commit/7b57e8d51446297b8c7c482d224bc5f1938e4301

View Patch ZIP pw:eip

Patch patch

https://github.com/python/cpython/commit/7ccdbaba2c54250a70d7f25632152df7655a5e0a

View Patch ZIP pw:eip

Patch patch

https://github.com/python/cpython/commit/eee3ddf0ca10283cc7fea724aae9cd8665f8d15e

View Patch ZIP pw:eip

Scores

CVSS v4 2.0

EPSS 0.0030

EPSS Percentile 22.2%

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-281

Status published

Products (1)

Python Software Foundation/CPython < 3.15.0

Published Jun 30, 2026

Tracked Since Jun 30, 2026