Missing Authentication for Critical Function Affecting windows-mcp package, versions [,0.7.5)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published28 Jun 2026
- disclosed18 Jun 2026
- creditUnknown
Introduced: 18 Jun 2026
CVE-2026-48989 (opens in a new tab)How to fix?
Upgrade windows-mcp to version 0.7.5 or higher.
Overview
windows-mcp is a Lightweight MCP Server for interacting with Windows Operating System.
Affected versions of this package are vulnerable to Missing Authentication for Critical Function in the HTTP transport process when authentication is not enforced and wildcard CORS is enabled. An attacker can execute arbitrary PowerShell commands as the Windows user running the application by sending requests from any origin or non-browser client.