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Findings

CVE-2026-104843

uv: Path traversal on Windows through wheel extraction

Published Oct 5, 2026 · updated Oct 15, 2026

### 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.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 5, 2026 · GitHub Advisory Database

    Detected

    ### 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.

  2. Oct 15, 2026 · GitHub Advisory Database

    Fix available

    uv fixed in 0.12.18; uv fixed in 0.12.18

  3. Oct 15, 2026 · GitHub Advisory Database

    Fix available

    uv fixed in 0.12.18

  4. Oct 15, 2026 · GitHub Advisory Database

    Updated

    ### 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.

Affected

  • PyPI uv0.12.7 → 0.12.18
  • crates.io uv0.12.7 → 0.12.18

Sources

References