CVE-2026-73030

EUVD-2026-55802
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.
Path Traversal
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
VulnCheckCNA
8.1 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
frostmingunearth
𝑥
≤ 0.18.2
CNA
Common Weakness Enumeration
References
https://github.com/frostming/unearth/commit/6c78164e7bfa28b8b3d6f247b87e560692e3c8ba
https://github.com/frostming/unearth/issues/180
https://github.com/frostming/unearth/pull/181
https://www.vulncheck.com/advisories/unearth-path-traversal-via-unnormalized-paths-and-symlink-escape