The Lethal Trifecta: Securing Model Context Protocol Against Data Flow Attacks

The Model Context Protocol (MCP) standardizes how large language models (LLMs) and their autonomous agents interact with external services and sensitive data. While this interconnectivity drives utility, it also introduces novel security vulnerabilities. The most critical threat is characterized by the Lethal Trifecta: the concurrent presence of access to private data, exposure to untrusted content, and the ability to externally communicate.