VectorCertain's MYTHOS Playbook Provides Technical Blueprint for Five Eyes Agentic AI Security Guidance

VectorCertain LLC today announced the completion of manuscript-prep for The MYTHOS Playbook, a 34-chapter technical reference designed to operationalize the new Five Eyes joint guidance on agentic AI security. The book, set for June 2026 publication, provides CISOs with direct mappings to every risk class identified in the May 1, 2026 guidance co-authored by CISA, NSA, Australia's ASD ACSC, the Canadian Centre for Cyber Security, NZ NCSC, and UK NCSC.

The Five Eyes guidance, titled "Careful Adoption of Agentic AI Services," identifies five risk classes: privilege, design and configuration, behavioral, structural, and accountability. The MYTHOS Playbook maps each class to specific chapters and appendices. For privilege risks, Part II covers least-privilege architecture through the MRM-CFS-SG governance gates. Design and configuration risks are addressed in Parts II and VI, including a 12-clause vendor RFP language library in Appendix G. Behavioral risks map to Part III's seven-vector threat taxonomy and Part IV's statistical detection methodology. Structural risks are covered by Chapter 8's 8-2-8 compositional safety model and Part V's real-time monitoring patterns. Accountability risks are addressed through Appendix F's hash-chained audit records and Chapter 22's Crumpton 5/5 disclosure methodology.

The book's detection methodology is built on 7,000 adversarial scenarios with 100% recall and a 3-sigma lower bound of ≥99.65% using Clopper-Pearson exact binomial confidence intervals. Appendix C provides a 119-cell cross-walk matrix mapping Five Eyes risk classes to NIST AI RMF, OWASP LLM Top 10, OWASP Agentic Top 10, CRI FS AI RMF, and MITRE ATLAS.

VectorCertain CEO Joseph P. Conroy emphasized the importance of the convergence: "The Five Eyes did the hard policy work. The MYTHOS Playbook is the operational complement: the technical reference a CISO can hand to a security architect, who can then specify enforcement at deployment depth." The manuscript was structurally complete before the Five Eyes guidance was published, with the risk taxonomy independently derived from real-world incident analysis.

Market data underscores the urgency. One in eight enterprise breaches now involves AI agents, a 340% year-over-year increase, with 78% of compromised agents over-permissioned. Analysis of 18,470 production agent configurations found 98.9% lack deny rules entirely. The Centre for Long-Term Resilience documented 698 real-world AI deception incidents in a single six-month window.

The book includes architectural patterns from SecureAgent, VectorCertain's AI agent security platform, which has logged 14,208 internal trials with zero failures and a false-positive rate of 1 in 160,000. The patent portfolio underlying the book includes 55 patents valued at $285M-$1.55B.

Pre-order interest registration is open at vectorcertain.com. The companion volume After MYTHOS: The C-Suite and Board Volume follows in Q2 2027.