# MCP for agent-to-agent communication may be the riskiest protocol you've never heard of

https://mins.news/en/item/87119

- Ars Technica, 2026-10-05 22:26 UTC
- Tech
- Original: https://arstechnica.com/security/2026/10/vulnerability-in-agents-from-google-and-others-exposes-structural-flaw-in-mcp/

> As AI agents spread across millions of organizations, attackers may exploit one agent to pass malicious instructions to others and exfiltrate databases or sensitive information. Researcher Syed Anas Mohiuddin found trust gaps in MCP, the Model Context Protocol, enabling this form of prompt injection across agents, with vulnerabilities acknowledged by Google and four other organizations.