dev.to· Oct 27, 2026· by dvaddi

Who Is the Agent Acting As? Why AI Agents Become Confused Deputies

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One injected line in a support ticket shows why an AI agent with a broad service account is a confused deputy, and where the authorization check has to live.
🎯 Vulnerability: Web Security Vulnerability
💡 Defense Fix: Implement strict input validation, contextual output encoding, and enforce least-privilege authorization controls.
#aiagents#authorization#security#mcp