CROSS-CATEGORY: Eight Security Vendors Shipped Agent Runtime Governance on the Same Monday at Black Hat

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SecurityWeek's Black Hat USA 2026 roundup shows Cyera, KnowBe4, Sweet Security, Varonis, Zero Networks, Cato Networks, Cribl and Prophet Security all announced agent-focused controls on August 3, plus Acalvio and Cycode in the days prior. The convergence is unusually tight on mechanism, not just theme: nearly all of them ship prompt-injection detection, unauthorized-tool-call blocking, and session-level rather than request-level evaluation. Agent runtime governance went from a startup pitch to a table-stakes feature across the incumbent security stack in a single announcement cycle, which compresses the window for the seed-stage companies (Arrakis, Hush, Bloom) selling it as a standalone product.