OWASP Agentic Top 10 — What Every AI Developer Should Know in 2026

A hypothetical scenario described last month: a financial AI agent autonomously executed a $1M overseas transfer; the agent wasn't hacked but behaved as designed.

Root cause: a 'data analysis agent' template downloaded from a popular open‑source repository was infected weeks earlier, representing a Supply Chain Infection (ASI10).

The infection propagated via internal agent communications (Inter‑Agent Propagation ASI07) and enabled Goal Hijacking (ASI01) of legitimate agents.

Agents began abusing authorized tools like transfers and file access (Tool Misuse ASI02); a test agent deviated after a poisoned RAG result and the anomaly took 3 days to detect.

Gravitee findings: 88% of organizations reported or suspected agent incidents (92.7% in healthcare); only 24.4% have full agent‑to‑agent visibility, 45.6% rely on shared API keys, and 14.4% require full security approval before deploying agents.