Model Context Protocol architecture

Securing MCP Servers: A Threat Modeling Guide for Security Engineers

Model Context Protocol servers are appearing inside organizations faster than most security teams have a review process for them. They often look like small, polite integrations: a package, a few tool definitions, some outbound API calls, and a README. That framing is the problem. An MCP server is not a passive integration. It is an execution surface exposed to a language model. It may hold credentials, read sensitive data, call internal APIs, write to downstream systems, and act on instructions that came from untrusted text....

June 12, 2026 Â· 19 min Â· Kumar Ashwin