astral-sh/uv · Security
uv: Path traversal on Windows through wheel extraction
- GHSA ID
- GHSA-2cv4-cqwr-gwf7
- CVE ID
- CVE-2026-104843
- Severity
- medium
- Published
- Updated
- CVSS v4
- 5.9 · 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
Description
Impact
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.
Patches
uv 0.12.18 and newer address this vulnerability. Users are encouraged to upgrade to 0.12.18.
Workarounds
There is no workaround other than upgrading to uv 0.12.18.
CWEs
- CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
References
- https://github.com/astral-sh/uv/security/advisories/GHSA-2cv4-cqwr-gwf7 ↗
- https://nvd.nist.gov/vuln/detail/CVE-2026-104843 ↗
- https://github.com/astral-sh/uv/pull/21923 ↗
- https://github.com/astral-sh/uv/commit/67169645278ce082638d619beefa6d062540843b ↗
- https://github.com/astral-sh/uv/releases/tag/0.12.18 ↗
- https://github.com/advisories/GHSA-2cv4-cqwr-gwf7 ↗