v5.4.0

Version 5.4.0 (released February 5, 2026) is an update to a security framework that documents new attack techniques targeting AI agents, including publishing poisoned AI agent tools (malicious versions of legitimate tools), escaping from AI systems to access the host computer, and exploiting vulnerabilities to steal credentials or evade security. The update also includes new real-world case studies showing how attackers have compromised AI agent control systems and used prompt injection (tricking an AI by hiding commands in its input) to establish control.