Vulnerability Report

CVE-2026-4360

Title: Tarfile Improper Filter for Hardlinks

Other

Proof Of Concept

No public PoC currently indexed for CVE-2026-4360.

CWE Category CWE-281

Published Date Jun 30, 2026

Modified Date Jul 09, 2026

Exploit Status Not Found

Score 2.0 CVSS v4.0

Exploit Probability (EPSS)

0.23%

Vulnerability Summary

CVE-2026-4360: 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.

Impacted Vendors

python 1

python_software_foundation 1

Reference Links

https://github.com/python/cpython/issues/151987 https://github.com/python/cpython/pull/151988 https://mail.python.org/archives/list/[email protected]/thread/TWZW2PC2AZOV6FENIHFSRC63OM7MBGSB/

CVSS v4.0

Source Entity [email protected]

Severity LOW

2.0

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

PASSIVE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

N/A

RAW 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/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

CVSS v3.1

Source Entity [email protected]

Severity MEDIUM

5.3

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Associated Attack Patterns (CAPEC)

Total: Patterns