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CVE-2026-104843— uv: Path traversal on Windows through wheel extraction

Quick assessment

Affected
astral-sh uv
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

uv 是一个用 Rust 编写的 Python 包和项目管理系统。在版本 0.12.7 至 0.12.18 之间，uv 在 Windows 系统上解包 wheel 文件时，可能会因处理恶意 wheel 文件而将文件写入安装前缀之外的目录，包括将可执行文件写入用户 PATH 环境变量中已存在的目录。非 Windows 主机不受此问题影响。该问题已在版本 0.12.18 中得到修复。

CVSS 5.9 · Medium

Affected Version Matrix 1

VendorProduct Version RangeStatus
astral-sh uv >= 0.12.7, < 0.12.18 affected
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I. Basic Information for CVE-2026-104843

Vulnerability Information
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Vulnerability Title
uv: Path traversal on Windows through wheel extraction
Source: CVE Program / CVE List V5
Vulnerability Description
uv is a Python package and project manager written in Rust. From 0.12.7 until 0.12.18, uv wheel extraction on Windows can process a malicious wheel in a way that writes a file outside the installation prefix, including an executable in a directory already present on the user's PATH. Non-Windows hosts are not affected. This issue is fixed in version 0.12.18.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
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

Affected Products

Vendor Product Affected Versions CPE Subscribe
astral-sh uv >= 0.12.7, < 0.12.18 -

II. Public POCs for CVE-2026-104843

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III. Intelligence Information for CVE-2026-104843

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Patches & Fixes for CVE-2026-104843 (2)

Vendor Advisories for CVE-2026-104843 (1)

Vendor Pages for CVE-2026-104843 (1)

IV. Related Vulnerabilities

Same product: uv
Same vendor: astral-sh
Same weakness: CWE-22

V. Comments for CVE-2026-104843

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