frostming unearth up to 0.18.2 is_within_directory path traversal

Summaryinfo

A vulnerability classified as critical has been found in frostming unearth up to 0.18.2. This issue affects the function is_within_directory. Performing a manipulation results in path traversal. This vulnerability is reported as CVE-2026-73030. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in frostming unearth up to 0.18.2. It has been classified as critical. This affects the function is_within_directory. The manipulation with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-73030 since 08/10/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1006 for this issue.

Applying the patch 6c78164e7bfa28b8b3d6f247b87e560692e3c8ba is able to eliminate this problem.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• frostming

Name

• unearth

Version

• 0.18.0
• 0.18.1
• 0.18.2

Website

• Product: https://github.com/frostming/unearth/

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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