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.

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/python/cpython/commit/0367912be336348b30572f8029cec4a282782d92
https://github.com/python/cpython/commit/5e0ef3f1afe892e4f64eb83368db57ac4c40cba0	Patch
https://github.com/python/cpython/commit/7b57e8d51446297b8c7c482d224bc5f1938e4301	Patch
https://github.com/python/cpython/commit/7ccdbaba2c54250a70d7f25632152df7655a5e0a	Patch
https://github.com/python/cpython/commit/cf23b9153181062150d061468b6d24af33fe214f
https://github.com/python/cpython/commit/d2b2f5eacab4dd48446b63340613b05dcbbf0b44	Patch
https://github.com/python/cpython/commit/eee3ddf0ca10283cc7fea724aae9cd8665f8d15e	Patch
https://github.com/python/cpython/issues/151987	Issue Tracking Patch
https://github.com/python/cpython/pull/151988	Issue Tracking Patch
https://mail.python.org/archives/list/security-announce@python.org/thread/TWZW2PC2AZOV6FENIHFSRC63OM7MBGSB/	Issue Tracking Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:python:python:*:*:*:*:*:*:*:*

History

25 Oct 2026, 21:10

Type	Values Removed	Values Added
Summary		(es) En la función Tarfile.extract(), el parámetro filter no se pasa correctamente al extraer hardlinks. Un sistema afectado que extrae contenido de archivos tar no confiables podría terminar escribiendo archivos con un uid/gid inesperado a pesar de que el usuario pase filter=’data’ a la función extract().

Information

Published : 2026-06-30 15:16

Updated : 2026-10-25 21:10

NVD link : CVE-2026-4360

Mitre link : CVE-2026-4360

CVE.ORG link : CVE-2026-4360

JSON object : View

Products Affected

python

python

CWE

CWE-281

Improper Preservation of Permissions

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