CVE-2026-4360: Python

Medium severity, CVSS 5.3. EPSS: 0.5% chance of exploitation in the next 30 days.

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.

Affected products

• Python Python: before 3.1.5 (fixed in 3.1.5)

Published 2026-06-30. Last modified 2026-08-13.