For the first time on a major AI platform release, security shipped at launch — not bolted on 18 months later. At Nvidia GTC this week, five security vendors announced protection for Nvidia’s agentic AI stack, four with active deployments, one with validated early integration.The timing reflects how fast the threat has moved: 48% of cybersecurity professionals rank agentic AI as the top attack vector heading into 2026. Only 29% of organizations feel fully ready to deploy these technologies securely. Machine identities outnumber human employees 82 to 1 in the average enterprise. And IBM’s 2026 X-Force Threat Intelligence Index documented a 44% surge in attacks exploiting public-facing applications, accelerated by AI-enabled vulnerability scanning.Nvidia CEO Jensen Huang made the case from the GTC keynote stage on Monday: “Agentic systems in the corporate network can access sensitive information, execute code, and communicate externally. Obviously, this can’t possibly be allowed.” Nvidia defined a unified threat model designed to flex and adapt for the unique strengths of five different vendors. Nvidia also names Google, Microsoft Security and TrendAI as Nvidia OpenShell security collaborators. This article maps the five vendors with embargoed GTC announcements and verifiable deployment commitments on record, an analyst-synthesized reference architecture, not Nvidia’s official canonical stack.No single vendor covers all five governance layers. Security leaders can evaluate CrowdStrike for agent decisions and identity, Palo Alto Networks for cloud runtime, JFrog for supply chain provenance, Cisco for prompt-layer inspection, and WWT for pre-production validation. The audit matrix below maps who covers what. Three or more unanswered vendor questions mean ungoverned agents in production.The five-layer governance frameworkThis framework draws from the five vendor announcements and the OWASP Agentic Top 10. The left column is the governance layer. The right column is the question every security leader’s vendor should answer. If they can’t answer it, that layer is ungoverned.Governance LayerWhat To DeployRisk If NotVendor QuestionWho Maps HereAgent DecisionsReal-time guardrails on every prompt, response, and actionPoisoned in …