Hi,

The following vulnerability was published for unearth.

CVE-2026-73030[0]:
| unearth through 0.18.2, fixed in commit 6c78164, contains a path
| traversal vulnerability in the is_within_directory function that
| fails to normalize paths before validation, allowing ../ sequences
| to bypass directory containment checks. Attackers can supply
| malicious tar archives with symlink members or traversal sequences
| to write files to arbitrary filesystem locations accessible to the
| process.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2026-73030
https://www.cve.org/CVERecord?id=CVE-2026-73030
[1] https://github.com/frostming/unearth/issues/180
[2] https://github.com/frostming/unearth/pull/181
[3] https://github.com/frostming/unearth/commit/6c78164e7bfa28b8b3d6f247b87e560692e3c8ba

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore