Microsoft UFO open-source framework for intelligent automation across devices and platforms. Prior to 3.0.8, ufo/client/mcp/http_servers/linux_mcp_server.py binds a FastMCP streamable HTTP server to localhost:8010 but does not validate the Host, Origin, or Sec-Fetch-Site headers. An attacker-controlled web page can use DNS rebinding to reach the local /mcp endpoint, enumerate tool schemas through tools/list, and invoke execute_command with a valid UFO_MCP_API_KEY to read files or execute allowed operating system commands as the victim's user. This issue is fixed in version 3.0.8.

A DNS rebinding vulnerability exists in Microsoft UFO, an open-source framework for intelligent automation, prior to version 3.0.8. The linux_mcp_server.py file binds a FastMCP HTTP server to localhost:8010 without validating Host, Origin, or Sec-Fetch-Site headers. An attacker-controlled web page can exploit DNS rebinding to access the local /mcp endpoint, enumerate tool schemas via tools/list, and invoke execute_command using a valid UFO_MCP_API_KEY. This allows attackers to read files or execute OS commands with the victim's user privileges. The vulnerability requires the victim to visit a malicious web page while running the UFO framework locally. The issue has been patched in version 3.0.8 of the Microsoft UFO framework.