CVE-2026-11940

tarfile.extractall() with the 'data' or 'tar'

filter could be bypassed by a crafted archive where a hardlink

references a symlink stored at a deeper name than the hardlink itself.

The extraction fallback validated the symlink at it's archived location

but recreated it at the hardlink's shallower

path, letting a relative

target the filter judged contained escape the destination directory.

This allowed a malicious tar archive to create a symlink pointing

outside the destination, enabling out-of-destination file reads or

writes. This was an incomplete fix of CVE-2025-4330.