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  4. CVE 2026 104843 uv path traversal on windows through wheel
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Back to active CVEs
Medium · CVSS 5.9CVE-2026-104843

uv: Path traversal on Windows through wheel extraction

Answer in brief

CVE-2026-104843 records a Medium severity (CVSS 5.9) vulnerability in uv: Path traversal on Windows through wheel extraction. The current sources do not mark it as known exploited. The current feed maps astral-sh/uv (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 2, 2026Updated Oct 2, 2026Source checked Oct 2, 2026First seen by HOL Oct 2, 2026Material review Oct 2, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 5.9
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 5.9. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps astral-sh/uv (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
astral-sh/uvgeneric>=0.12.7 <0.12.180.12.18

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for astral-sh/uv.
  2. 2Review the reported fix. Update astral-sh/uv to 0.12.18 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 2, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 2, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 2, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in image-downloaderAlso CWE-22
  • Logback: Incomplete protection against CVE-2026-19880Also CWE-22
  • Nx: Path traversal in nx migrate package-migrations extractionAlso CWE-22
  • Missing Authorization in Meari IoT Cloud Platform OpenAPI ServiceSame generic ecosystem
  • LimeSurvey Community Edition 7.4.0 - Stored XSS through the Date/Time date_min question attributeSame generic ecosystem
  • CISA ADP VulnrichmentSame generic ecosystem

Record context

Vulnerability class
Path Traversal
EPSS
Not reported
CWE IDs
CWE-22
Source
CVE List V5
Source checked
Oct 2, 2026
References
4 linked sources
Open source record