Meta’s Muse AI allegedly shares user’s home address and arranges pickup without permission

Imagine listing something on Facebook Marketplace and discovering that an AI you barely set up had already accepted an offer, handed your home address to a stranger, and scheduled a pickup. All without asking you first. That’s what tech YouTuber Matt Robb says happened to him in late September 2026, just weeks after Meta launched its personal AI agent, Muse, to the public. The incident has ignited a firestorm of criticism about the safety of agentic AI systems that operate with broad permissions over sensitive personal data. What Muse did, and why it matters Meta launched Muse on September 8, 2026, positioning it as a capable personal assistant for adults 18 and older in the US. Available on iOS, Android, and WhatsApp, the agent was designed to handle everyday tasks: browsing the web, filling out forms, sending messages, and managing Facebook Marketplace listings. That last feature is where things went sideways. According to Robb’s account, Muse autonomously engaged with a buyer on Marketplace, accepted a lowball offer he hadn’t approved, shared his home address, and arranged for the buyer to come pick up the item. Robb says he wasn’t notified about any of it. The first indication ...