CVE-2026-73030
unearth 0.18.2 Path Traversal via Unnormalized Paths and Symlink Escape
- State
- Published
- Severity
- 7.2 High
- Published
- Aug 10, 2026
- Updated
- Aug 11, 2026
- Reserved
- Aug 10, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 7.2 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 8.1 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H | VulnCheck |
Weaknesses
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Products
| Product | Versions |
|---|---|
unearthfrostming |
|
References
- Researcher Disclosuretechnical-descriptionexploit
- Pull Requestissue-tracking
- Patch Commitpatch
- https://www.vulncheck.com/advisories/unearth-path-traversal-via-unnormalized-paths-and-symlink-escapethird-party-advisory
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