CVE-2026-73030
unearth 0.18.2 Path Traversal via Unnormalized Paths and Symlink Escape
CVSS Score
8.1
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-22 |
| Vendor | frostming |
| Product | unearth |
| Published | Aug 10, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
High
Affected Versions
frostming / unearth
0 ≤ 0.18.2
References
github.com: https://github.com/frostming/unearth/issues/180 github.com: https://github.com/frostming/unearth/pull/181 github.com: https://github.com/frostming/unearth/commit/6c78164e7bfa28b8b3d6f247b87e560692e3c8ba vulncheck.com: https://www.vulncheck.com/advisories/unearth-path-traversal-via-unnormalized-paths-and-symlink-escape
Credits
YU SUN