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CVE-2026-73030— unearth 0.18.2 Path Traversal via Unnormalized Paths and Symlink Escape

Quick assessment

Affected
frostming unearth
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

frostming unearth是frostming个人开发者开源的一个Python包索引客户端。 frostming unearth 0.18.2及之前版本存在路径遍历漏洞，该漏洞源于is_within_directory函数在验证前未能规范化路径，允许../序列绕过目录包含检查，攻击者可提供包含符号链接成员或遍历序列的恶意tar存档，将文件写入进程可访问的任意文件系统位置。

CVSS 8.1 · High EPSS 0.59% · P48

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 2

VendorProduct Version RangeStatus
frostming unearth ≤ 0.18.2 affected
6c78164e7bfa28b8b3d6f247b87e560692e3c8ba unaffected
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I. Basic Information for CVE-2026-73030

Vulnerability Information
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Vulnerability Title
unearth 0.18.2 Path Traversal via Unnormalized Paths and Symlink Escape
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
frostming unearth 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
frostming unearth是frostming个人开发者开源的一个Python包索引客户端。 frostming unearth 0.18.2及之前版本存在路径遍历漏洞，该漏洞源于is_within_directory函数在验证前未能规范化路径，允许../序列绕过目录包含检查，攻击者可提供包含符号链接成员或遍历序列的恶意tar存档，将文件写入进程可访问的任意文件系统位置。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
frostming unearth 0 ~ 0.18.2 -

II. Public POCs for CVE-2026-73030

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 11093 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-73030

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Patches & Fixes for CVE-2026-73030 (2)

Vendor Advisories for CVE-2026-73030 (2)

IV. Related Vulnerabilities

Same weakness: CWE-22

V. Comments for CVE-2026-73030

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