Security Vulnerabilities of Model Context Protocol (MCP): A Technical Deep Dive
Executive Summary The Model Context Protocol (MCP) has rapidly become the de facto standard for connecting LLMs to external tools, APIs, databases, filesystems, and services. While MCP dramatically improves interoperability, it also introduces an entirely new attack surface that traditional application security models were not designed to handle. The central problem is simple: > MCP transforms LLMs from passive text generators into active systems capable of executing actions on behalf of users. As a result, vulnerabilities no longer exist only in application code. They now exist in: * Tool metadata * Prompt flows * Agent reasoning chains * Context propagation * Third-party MCP servers * Tool marketplaces * Authentication boundaries * Multi-agent interactions Recent academic research, OWASP guidance, industry security advisories, and real-world vulnerability disclosures show that MCP deployments can be vulnerable to prompt injection, tool poisoning, privilege escalation, remote...
