VectorCertain LLC today announced the completion of manuscript preparation for The MYTHOS Playbook, a 34-chapter technical reference designed to help CISOs and security architects implement the new Five Eyes joint guidance on agentic AI security. The book, scheduled for June 2026 publication, directly maps to all five risk classes identified in the May 1, 2026 guidance issued by CISA, NSA, and agencies from Australia, Canada, New Zealand, and the UK.
The Five Eyes guidance, titled "Careful Adoption of Agentic AI Services," identifies five risk classes: privilege, design and configuration, behavioral, structural, and accountability. It marks the first coordinated multi-government security guidance specifically addressing autonomous AI agents, classifying agentic AI risk as a critical national infrastructure concern. The guidance states that "agentic artificial intelligence (AI) systems increasingly operate across critical infrastructure and defense sectors" and warns that organizations should "assume that agentic AI systems may behave unexpectedly and plan deployments accordingly, prioritizing resilience, reversibility and risk containment over efficiency gains."
The market context underscores the urgency. According to VectorCertain's research, one in eight enterprise breaches now involves AI agents—a 340% year-over-year surge—with 78% of compromised agents over-permissioned. Gartner projects AI agents will be embedded in 40% of enterprise applications by the end of 2026, up from less than 5% in 2025. Analysis of 18,470 production agent configurations found that 98.9% lack deny rules entirely, while a separate report documented 698 real-world AI deception incidents in a single six-month window.
The MYTHOS Playbook fills the gap between policy-level recommendations and operational implementation. It provides architectural patterns, a statistical detection methodology validated across 7,000 adversarial scenarios with 100% recall and a 3-sigma lower bound of at least 99.65%, vendor RFP language, and a 119-cell framework cross-walk matrix. The cross-walk maps every Five Eyes risk class to NIST AI RMF, OWASP LLM Top 10, OWASP Agentic Top 10, CRI FS AI RMF, and MITRE ATLAS, enabling CISOs to trace requirements across existing compliance frameworks.
Joseph P. Conroy, founder and CEO of VectorCertain, said: "The Five Eyes did the hard policy work—establishing that agentic AI risk is a national-security-grade concern. The MYTHOS Playbook is the operational complement: the technical reference a CISO can hand to a security architect." Conroy noted that the book's risk taxonomy was independently derived from real-world incident analysis and converged with the Five Eyes guidance, providing independent validation of both documents.
The book is structured in seven parts covering foundations, architecture, threat vectors, detection frameworks, SOC operations, deployment, and nine appendices. The appendices include a confusion matrix worksheet for CIOs to apply Clopper-Pearson exact binomial calculations, a vendor RFP language library with 12 inheritance-bearing clauses, and a hash-chained audit record sample for accountability. The book is built on VectorCertain's SecureAgent platform, which has undergone 14,208 internal trials with zero failures and a false-positive rate of 1 in 160,000—53,333 times below the industry average.
The convergence between VectorCertain's independently derived risk taxonomy and the Five Eyes guidance is operationally significant. It confirms that the underlying threat landscape is real and observable, and that rigorous treatment leads to the same five risk classes. For CISOs and procurement teams, The MYTHOS Playbook offers a ready-to-use implementation reference that translates policy into practice.
Pre-order interest registration is open at vectorcertain.com. The companion volume "After MYTHOS: The C-Suite and Board Volume" is scheduled for Q2 2027.
