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CVE-2026-73030

unearth 0.18.2 Path Traversal via Unnormalized Paths and Symlink Escape

7.2 HighFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
Passive

What an attacker can affect

Confidentiality
None
Integrity
High
Availability
High

Exploit likelihood

0.59%Up 0.2 points since Aug 11, 2026
90%50%10%1%

What each source reports

CVE List Score used 7.2

unearth 0.18.2 Path Traversal via Unnormalized Paths and Symlink Escape

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.

Record
CVE-2026-73030
CVSS 4.0
7.2 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS 3.1
8.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
Weakness
CWE-22
Updated
2026-11-02
EUVDEUVD-2026-55802 7.2

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.

Record
EUVD-2026-55802
CVSS 4.0
7.2 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-2fcv-9f95-p67v 7.2

unearth through 0.18.2, fixed in commit 6c78164, contains a path traversal vulnerability in the...

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.

Record
GHSA-2fcv-9f95-p67v
CVSS 4.0
7.2 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1
8.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
Weakness
CWE-22
Updated
2026-11-02
NVD 7.2

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.

Record
CVE-2026-73030
CVSS 4.0
7.2 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1
8.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
Weakness
CWE-22
Updated
2026-11-02
OSV 7.2

unearth 0.18.2 Path Traversal via Unnormalized Paths and Symlink Escape

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.

Record
CVE-2026-73030
CVSS 4.0
7.2 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
Weakness
CWE-22
Updated
2026-11-02
OSVDEBIAN-CVE-2026-73030 7.2

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.

Record
DEBIAN-CVE-2026-73030
CVSS 4.0
7.2 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Updated
2026-11-02
OSVUBUNTU-CVE-2026-73030 7.2

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.

Record
UBUNTU-CVE-2026-73030
CVSS 4.0
7.2 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS 3.1
8.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
Updated
2026-11-02
OSVopenSUSE-SU-2026:11541-1 No score

python313-unearth-0.18.3-1.1 on GA media

These are all security issues fixed in the python313-unearth-0.18.3-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2026:11541-1
Updated
2026-11-02
OSVopenSUSE-SU-2026:21606-1 No score

Security update for python-unearth

This update for python-unearth fixes the following issues:

Changes in python-unearth:

  • CVE-2026-73030: is_within_directory function fails to normalize paths before validation and allows ../ sequences to bypass directory containment checks (bsc#1275440)
Record
openSUSE-SU-2026:21606-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
unearth
Debian:12
All versions, plus listed versions
0.10.0+ds1-10.11.0+ds-10.12.1+ds-10.14.0+ds-10.15.0+ds-1
Show 19 moreShow less
0.15.1+ds-10.15.2+ds-10.15.3+ds-10.15.4+ds-10.15.5+ds-10.16.0+ds-10.16.1-10.17.1-10.17.2-10.17.3-10.17.5-10.18.1-10.18.2-10.18.3-10.18.3-20.7.2+ds-20.8.1+ds-1~exp10.9.1+ds-10.9.2+ds1-1
None known
unearth
Debian:13
All versions, plus listed versions
0.17.5-10.18.1-10.18.2-10.18.3-10.18.3-2
None known
unearth
Debian:14
before 0.18.3-1, plus listed versions
0.17.5-10.18.1-10.18.2-1
0.18.3-1
unearth
Ubuntu:24.04:LTS
All versions, plus listed versions
0.9.2+ds1-10.11.0+ds-10.12.1+ds-10.14.0+ds-1
None known
unearth
Ubuntu:26.04:LTS
All versions, plus listed versions
0.17.5-10.18.1-10.18.2-1
None known
python-unearth
openSUSE:Tumbleweed
From an advisory covering 2 CVEs
before 0.18.3-1.1
0.18.3-1.1
python-unearth
openSUSE:Leap 16.0
before 0.17.3-bp160.2.1
0.17.3-bp160.2.1

History

History
RecordedChangedSources
affected, facts
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-73030 is a high vulnerability (CVSS 7.2) in Frostming Unearth, published August 10, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.59%, the 48th percentile. Fixed in unearth 0.18.3-1.

References

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