p PatchFirst

CVE-2026-48989

CVE-2026-48989 · Windows-MCP: HTTP transports expose unauthenticated PowerShell control with wildcard CORS

This page contains facts from public vulnerability sources. Check the original advisory before updating.

Windows-MCP is an open-source project that integrates AI agents with Windows. In versions prior to 0.7.5, certain HTTP modes exposed the MCP control plane without authentication while enabling wildcard CORS (allow_origins=*, allow_methods=*, allow_headers=*). Because the same server also exposed a PowerShell tool that executes caller-controlled commands as the Windows user running Windows-MCP, attackers could reach the control plane from arbitrary origins or non-browser clients and achieve arbitrary PowerShell execution. This issue was fixed in version 0.7.5.

CVSS 8.9 · High · EPSS 0.4% · Fix available

Published
Updated

Stack: python

Affected products and versions

  • windows-mcp

    Versions
    • < 0.7.5: Affected

    No fix published

  • windows-mcp PyPI

    Versions
    • 0.6.5
    • 0.6.6
    • 0.6.7
    • 0.6.8
    • 0.6.9
    • 0.7.0
    • 0.7.1
    • 0.7.3
    • 0.7.4
    Affected ranges
    • ECOSYSTEM: < 0.7.5

    Update to 0.7.5

Original sources

Check your server →