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OpenAdvisories
High · 8.9 CVE-2026-48989 EUVD-2026-37800GHSA-vrxg-gm77-7q5gPYSEC-2026-3425

Windows-MCP: HTTP transports expose unauthenticated PowerShell control with wildcard CORS

Published Jun 17, 2026 · Updated Jun 18, 2026 · Assigned by GitHub_M

Description

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.

Affected products

VendorProductAffectedFixed
CursorTouch Windows-MCP < 0.7.5 —

Affected packages

EcosystemPackageAffectedFixedRecord
PyPI windows-mcp < 0.7.5 0.7.5 GHSA-vrxg-gm77-7q5g

References