What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 8.9 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-17 · updated 2026-10-26
• Weakness: CWE-306

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

• CursorTouch Windows-MCP: before 0.7.5

References

• https://github.com/CursorTouch/Windows-MCP/releases/tag/v0.7.5
• https://github.com/CursorTouch/Windows-MCP/security/advisories/GHSA-vrxg-gm77-7q5g

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