CVE-2026-104843: Path Traversal

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.

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Weakness Type (CWE)

CWE-22 Path Traversal

References

Other References

https://github.com/astral-sh/uv/commit/67169645278ce082638d619beefa6d062540843b https://github.com/astral-sh/uv/pull/21923 https://github.com/astral-sh/uv/releases/tag/0.12.18 https://github.com/astral-sh/uv/security/advisories/GHSA-2cv4-cqwr-gwf7

Frequently Asked Questions

What is CVE-2026-104843? +

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.

How do I check if I'm vulnerable to CVE-2026-104843? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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