Cybersecurity researchers from Check Point Research have revealed a prompt adware named Haiou embedded within an OpenAI Codex jailbreak toolkit that modifies the AI agent’s instruction set to inject persistent advertisements for a third-party AI gateway. This prompt adware bypasses traditional payload detection by altering natural language prompts and global configurations, potentially facilitating supply chain attacks and undermining trust in AI agent behavior, especially as such agents grow more integrated into enterprise environments.
https://thehackernews.com/2026/11/researchers-uncover-prompt-adware.html