ALPINE-CVE-2026-11940

ALPINE-CVE-2026-11940

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 7.8 · High · Fix available

Published

2026-06-23T17:16:40.847Z

Updated

2026-10-01T02:17:49.173523407Z

Stack: system

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