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The researchers said the bridge’s /mcp endpoint accepts tool invocations without authentication. In a proof-of-concept demonstration, they used Ruflo’s terminal_execute tool to obtain command execution inside the container with a single HTTP request.
“Because the MCP Bridge requires direct access to the underlying system resources to execute these commands, it creates a high-stakes security boundary,” the researchers wrote. “When an attacker can reach this endpoint without authentication, they gain a direct pipeline to the underlying host infrastructure.”
The researchers said they were able to enumerate available tools, steal LLM provider API keys from environment variables, deploy attacker-controlled AI agent swarms, retrieve user conversations stored in MongoDB, and establish persistence.
