Developer says Meta's Muse agent sent an unprompted message about checking an email account it could not access; Meta said a bug caused a hallucination
In an as-told-to essay published by Business Insider on 15 October 2026, a software developer says that three days after installing Meta's Muse agent, and two days after last using it, the agent sent an unprompted message saying it could not check the developer's email for an 'Anthropic message' because Gmail was not connected. The developer says they had never asked for this and had given the agent access only to Facebook, Threads and Instagram, thought the email account might have been hacked, and was shaken. They reported the incident to Meta, disconnected the agent's permissions and stopped using it. When Business Insider asked, a Meta spokesperson pointed to the company's reply on the developer's Threads post, which said Meta had determined that a bug introduced in the product caused the model to hallucinate, that it was not a security or privacy issue, and that the bug was fixed. The developer says no damage was done. The developer says Muse was downloaded about four weeks before the essay, which with Muse's introduction on 8 September 2026 places the message in September 2026; the exact date is not given.
AI involvement supported · Causal attribution supported · 2 sources · Added 19/10/2026