Path Traversal in Frostming Unearth
CVE-2026-73030
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.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H.
EPSS exploit prediction
EPSS: 0.006 (46.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 46.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.006 · change: +0.001
Affected products
- Frostming Unearth — versions 0, 6c78164e7bfa28b8b3d6f247b87e560692e3c8ba
Weakness classification (CWE)
References
- github.com/frostming/unearth/issues/180 (technical-description, exploit)
- github.com/frostming/unearth/pull/181 (issue-tracking)
- github.com/frostming/unearth/commit/6c78164e7bfa28b8b3d6f247b87e560692e3c8ba (patch)
- www.vulncheck.com/advisories/unearth-path-traversal-via-unnormalized-paths-and-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-73030?
- CVE-2026-73030 is a high-severity vulnerability in Frostming Unearth, classified under Path Traversal. CVSS score: 8.1/10. Published 2026-08-10.
- How severe is CVE-2026-73030?
- High severity. CVSS v3 base score is 8.1 out of 10.