There is a LOW severity vulnerability affecting CPython.

In the Tarfile.extract function, the filter parameter is not passed properly called 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.

Please see the linked CVE ID for the latest information on affected versions:

• https://www.cve.org/CVERecord?id=CVE-2026-4360
• https://github.com/python/cpython/pull/151988