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

October 5, 2026

In versions of uv from 0.12.7 to 0.12.18 on Windows, uv could be induced into writing a file outside of the installation prefix during wheel installation.

A malicious wheel could use this to place an executable outside of the intended environment, including in a directory already present on the user’s PATH.

This vulnerability only affects Windows hosts; no other platforms are affected.

References

github.com/advisories/GHSA-2cv4-cqwr-gwf7
github.com/astral-sh/uv/commit/67169645278ce082638d619beefa6d062540843b
github.com/astral-sh/uv/pull/21923
github.com/astral-sh/uv/releases/tag/0.12.18
github.com/astral-sh/uv/security/advisories/GHSA-2cv4-cqwr-gwf7
nvd.nist.gov/vuln/detail/CVE-2026-104843

Code Behaviors & Features

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