AI agents now face four distinct attack surfaces beyond traditional LLM vulnerabilities. A Gravitee 2026 report reveals 88% of organizations experienced agentic AI security incidents last year, with only 14.4% deploying systems with full security approval. The Pomerium incident demonstrated how unvalidated tools can leak database credentials through malicious SQL execution. Memory poisoning attacks using frameworks like MINJA achieved 95% success rates in silently injecting false data, while planning loop compromises can redirect agents to malicious objectives without direct command injection.