TL;DRIn 2026 the autonomous agent stopped being a demo and became an attacker. Public incident write ups now describe ag...

TL;DRIn 2026 the autonomous agent stopped being a demo and became an attacker. Public incident write ups now describe agents that scan, pick targets, launch exploits, move laterally, and exfiltrate data across thousands of actions with one human command at the start. The defensive answer is not a new product. It is a set of boring, testable controls: cap what every agent (yours and theirs) is allowed to touch, treat every tool call as an untrusted request, log at the action level, and rehearse detection at machine speed. This post maps the threat to the OWASP Top 10 for LLM Applications (2026) and the OWASP Top 10 for Agentic Applications, and gives a concrete control checklist you can start on this week. What actually changed in 2026For three years "AI in cyber" mostly meant better phishing copy and faster malware triage. The qualitative shift this year is that the loop closed. An operator can now wire a capable model into an open agent framework in autonomous execution mode, point it...