July 2026
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Welcome to this edition of the AI Security Newsletter. This week’s stories make a fairly consistent point: agent security is moving beyond the model prompt. The controls that matter now sit in the harness, the sandbox, the enterprise context layer, and the operational systems an agent can reach. That is why OpenAI’s safety testing, a…
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Welcome to this edition of the AI Security Newsletter, covering the first half of July. A theme runs through these stories: measurement is catching up to agent deployment, and the numbers cut both ways. Tracebit turned prompt injection around and used it to stop attacking agents, Cotool began scoring frontier models against real intrusion data…
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Welcome to this edition of the AI Security Newsletter. This week highlights how AI security is becoming a systems problem: models are getting stronger, agents are getting more operational authority, and governance is moving from policy documents into runtime controls. We cover new research on why prompt injection works, real-world evidence that narrow and well-instructed…
