Medium severity · published Oct 2, 2026
CVE-2026-104843
uv: Path traversal on Windows through wheel extraction
5.9
CVSS
0.4%
EPSS
No
On KEV
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.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 37% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
UV
uv · astral-sh
>= 0.12.7, < 0.12.18 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-104843
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-104843
x_refsource_CONFIRM
https://github.com/astral-sh/uv/security/advisories/GHSA-2cv4-cqwr-gwf7
x_refsource_MISC
https://github.com/astral-sh/uv/pull/21923
x_refsource_MISC
https://github.com/astral-sh/uv/commit/67169645278ce082638d619beefa6d062540843b
x_refsource_MISC
https://github.com/astral-sh/uv/releases/tag/0.12.18
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