r/MachineLearning: Comprehensive 75-Day AI Agent Security Reference Synthesizes 18 Articles Covering April–June 2026 — 'Theoretical Concern to Operational Crisis'

A practitioner published a comprehensive living reference guide to AI agent security on r/MachineLearning, synthesizing 18 articles from The Agent Report covering the 75-day period (April–June 2026) described as the moment when agent security shifted from theoretical to operational. The guide covers attack surfaces unique to agentic systems including persistent memory poisoning, cross-service permission abuse, and tool-call spoofing, alongside defense patterns emerging in production deployments. The post is trending on r/MachineLearning and drawing engagement from researchers and practitioners building agent governance frameworks.