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CVE-2026-4360

Tarfile.extract() doesn't fully respect filter parameter

Published: Jun 30, 2026Updated: Aug 6, 2026 Sources: CVE List NVDCWE-281
5.3MEDIUM
NVD MITRE
EPSS Score
0.3%
Top 80.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-281

Affected Products

python
oss-project·US
pythonLibraryLibrary
OSS Libraries
Python Software Foundation
oss-project·USaka psf
CPython
OSS Libraries

Exploitability

Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Privilege Escalation
View detailed technique mapping

References

https://github.com/python/cpython/commit/0367912be336348b30572f8029cec4a282782d92
github.com
https://github.com/python/cpython/commit/5e0ef3f1afe892e4f64eb83368db57ac4c40cba0
github.com
https://github.com/python/cpython/commit/7b57e8d51446297b8c7c482d224bc5f1938e4301
github.com
and 7 more references View all →

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