CVE-2026-73030
unearth 0.18.2 Path Traversal via Unnormalized Paths and Symlink Escape
Description
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.
INFO
Published Date :
Aug. 10, 2026, 9:17 p.m.
Last Modified :
Oct. 24, 2026, 3:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 3.1 | HIGH | MITRE-CVE | ||||
| CVSS 4.0 | HIGH | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 4.0 | HIGH | [email protected] |
Solution
- Update unearth to a version that fixes path traversal.
- Avoid processing untrusted archives with unearth.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-73030.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-73030 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-73030
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-73030 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-73030 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Oct. 24, 2026
Action Type Old Value New Value Changed Translation Title: unearth de frostming, Description: unearth hasta la versión 0.18.2, corregido en el commit 6c78164, contiene una vulnerabilidad de salto de ruta en la función is_within_directory que no normaliza las rutas antes de la validación, permitiendo que las secuencias .. / omitan los controles de contención de directorios. Los atacantes pueden proporcionar archivos tar maliciosos con miembros de enlaces simbólicos o secuencias de salto para escribir archivos en ubicaciones arbitrarias del sistema de archivos accesibles para el proceso. Title: unearth de frostming, Description: unearth hasta la versión 0.18.2, corregido en el commit 6c78164, contiene una vulnerabilidad de salto de ruta en la función is_within_directory que no normaliza las rutas antes de la validación, permitiendo que las secuencias .. / omitan los controles de contención de directorios. Los atacantes pueden proporcionar archivos tar maliciosos con miembros de enlaces simbólicos o secuencias de salto para escribir archivos en ubicaciones arbitrarias del sistema de archivos accesibles para el proceso. -
CVE Translated by [email protected]
Oct. 23, 2026
Action Type Old Value New Value Added Translation Title: unearth de frostming, Description: unearth hasta la versión 0.18.2, corregido en el commit 6c78164, contiene una vulnerabilidad de salto de ruta en la función is_within_directory que no normaliza las rutas antes de la validación, permitiendo que las secuencias .. / omitan los controles de contención de directorios. Los atacantes pueden proporcionar archivos tar maliciosos con miembros de enlaces simbólicos o secuencias de salto para escribir archivos en ubicaciones arbitrarias del sistema de archivos accesibles para el proceso. -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Aug. 11, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-73030', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-08-11T17:16:01.368745Z'} -
New CVE Received by [email protected]
Aug. 10, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://github.com/frostming/unearth', 'vendor': 'frostming', 'product': 'unearth', 'versions': [{'status': 'affected', 'version': '0', 'versionType': 'semver', 'lessThanOrEqual': '0.18.2'}, {'status': 'unaffected', 'version': '6c78164e7bfa28b8b3d6f247b87e560692e3c8ba', 'versionType': 'git'}], 'packageURL': 'pkg:github/frostming/unearth', 'defaultStatus': 'affected'}] Added Description 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. Added CVSS V4.0 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 Added CVSS V3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H Added CWE CWE-22 Added Reference https://github.com/frostming/unearth/commit/6c78164e7bfa28b8b3d6f247b87e560692e3c8ba Added Reference https://github.com/frostming/unearth/issues/180 Added Reference https://github.com/frostming/unearth/pull/181 Added Reference https://www.vulncheck.com/advisories/unearth-path-traversal-via-unnormalized-paths-and-symlink-escape