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CVE-2026-11940 on CTRL-OS 26.05

Aliases: CVE-2026-11940

Packages: python3

Status: Plausible

Advisory Information

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.

Updates

2026-07-07 18:34 CEST

Metadata changes:

  • Status for package python3: “Plausible”

(Amended on: 2026-07-07 18:41 CEST)

2026-07-07 18:34 CEST

Metadata changes:

  • Status for package python3: “New”