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TI-2026-36245 Aliases CVE-2026-48989GHSA-vrxg-gm77-7q5g

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

Priority MEDIUM 47CWE-306Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-306.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00397 34th percentileScored 2026-11-07
Fix Fixed Windows-MCP (CursorTouch): 0.7.5windows-mcp (PyPI): 0.7.5

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
CursorTouchWindows-MCPbefore 0.7.50.7.5Patch availableCNA
—windows-mcp (PyPI)before 0.7.50.7.5Patch availableGHSA-vrxg-gm77-7q5g
  • Windows-MCP VendorCursorTouch Affected before 0.7.5 Fixed in 0.7.5 Patch available CNA
  • windows-mcp (PyPI) Vendor— Affected before 0.7.5 Fixed in 0.7.5 Patch available GHSA-vrxg-gm77-7q5g

Remediation

  • Fix · CNA Windows-MCP (CursorTouch) Fixed in 0.7.5
  • Fix · GHSA-vrxg-gm77-7q5g windows-mcp (PyPI) Fixed in 0.7.5 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-48989
  2. 2026-10-03 Alias added: GHSA-vrxg-gm77-7q5g
  3. 2026-10-25 EPSS moved to the below the 50th percentile

References

Advisory 1

Other 3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences