astral-sh uv up to 0.12.17 Wheel Extraction path traversal

Summaryinfo

A vulnerability classified as critical was found in astral-sh uv up to 0.12.17. This affects an unknown part of the component Wheel Extraction. Executing a manipulation can lead to path traversal. This vulnerability is registered as CVE-2026-104843. It is possible to launch the attack remotely. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability has been found in astral-sh uv up to 0.12.17 and classified as critical. This vulnerability affects an unknown function of the component Wheel Extraction. The manipulation with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-104843 since 10/02/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1006.

Upgrading to version 0.12.18 eliminates this vulnerability.

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Productinfo

Vendor

• astral-sh

Name

• uv

Version

• 0.12.0
• 0.12.1
• 0.12.2
• 0.12.3
• 0.12.4
• 0.12.5
• 0.12.6
• 0.12.7
• 0.12.8
• 0.12.9
• 0.12.10
• 0.12.11
• 0.12.12
• 0.12.13
• 0.12.14
• 0.12.15
• 0.12.16
• 0.12.17

Website

• Product: https://github.com/astral-sh/uv/

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