Meta's Muse AI agent for Mac had a 0-day letting any local app redirect voice data

Security researcher Patrick Wardle discovered that any app or Terminal command running on a Mac could silently alter undocumented settings in Meta's new Muse AI agent without requiring special macOS permissions. One affected setting, endo_voyager_dictation_endpoint, determines where a user's dictated voice prompts are transmitted, meaning an attacker could reroute that data elsewhere. The flaw surfaced just weeks after Meta heavily promoted Muse's security architecture, including a dedicated Secure VM, a monitoring system called Sentinel, and bug bounties up to $300,000.