CVE-2026-48989

HIGH

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

Title source: cna

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.

References (2)

Core 2

Core References

X_Refsource_Confirm x_refsource_confirm

https://github.com/CursorTouch/Windows-MCP/security/advisories/GHSA-vrxg-gm77-7q5g

X_Refsource_Misc x_refsource_misc

https://github.com/CursorTouch/Windows-MCP/releases/tag/v0.7.5

Scores

CVSS v4 8.9

EPSS 0.0040

EPSS Percentile 31.7%

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CISA SSVC

Vulnrichment

Exploitation none

Automatable yes

Technical Impact total

Details

CWE

CWE-306

Status published

Products (1)

CursorTouch/Windows-MCP < 0.7.5

Published Jun 17, 2026

Tracked Since Jun 18, 2026