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: 48.65%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources (CNA/ADP records, vendor advisories, Enginsight analysis).
VendorProductVersionSource
frostmingunearth
𝑥
≤ 0.18.2
CNA
Debian logo
Debian Releases
Debian Product
Codename
unearth
bookworm
postponed
forky
0.19.0-1
fixed
sid
0.19.0-1
fixed
trixie
no-dsa
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
unearth
jammy
dne
noble
needs-triage
resolute
needs-triage
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