Meta AI Muse under fire for sharing user's home address–Here’s what happened

Meta’s Muse AI agent has sparked new privacy concerns in a recent incident where it reportedly handled a Facebook Marketplace deal on behalf of users including performing a transaction and arranging unsolicited pickup.

According to details shared by verified Thread user Matt J. Muse, AI accepted a low offer for his MX Keys Mini keyboard at CA$15, and sent his address to the buyer.

“So Muse handled my Facebook Marketplace today. Just found out it told people my address and agreed a lowball price and then they showed up without even telling me until late tonight that it messed up,” Robb wrote in a Threads post.

Another screenshot showed how Meta agent informed the buyer named Usman that the keyboard is available for local pickup only and provides the specified location. Usman replies that he will attempt to pick it up tonight, confirms a specific arrival window between 8:00 PM and 10:00 PM, and promises to send a message beforehand.

Although Robb says he had not personally approved the arrangement.

Another screenshort showed how the AI agent handled the situation after the arrival of the buyer. The buyer arrived at 9:15 p.m., got an auto-reply from Muse saying “Yep I’m here!” despite Robb's absence, waited until 9:38 p.m., then left a negative rating.

“Bad news on the MX Keys Mini pickup. Usman showed up at your building around 9:15 and waited, messaged a bunch of times, and nobody came down. He left angry at 9:38 and left a negative rating,” the assistant said.

Later Robb instructed the agent not to make similar decisions again without checking with him. The assistant acknowledged these instructions and agreed to not accepting pickup without Robb’s approval.

However, the incident took the internet by storm and users raised privacy concerns amid AI backlash. One user wrote, “Deleted Muse after seeing this post on Threads about how it told some Facebook Marketplace sellers the guy’s address and they showed up at his door. Dangerous and creepy.”

Meta's David Singleton reached out to investigate, amid concerns that the AI overstepped by handling sensitive details like addresses without further checks.

He wrote on X, “I responded to Matt on Threads and sent him a couple of DMs offering to help and look into what happened.”

“In the past, when we’ve worked with users to investigate similar reports, we’ve consistently learned that Muse was following direct instructions and correctly asked for permission. I would love to help and figure out what’s going on here!”