US Banks Tighten Access for Third-Party AI Agents Amid Account Concerns

Major US banks are tightening security after reports that third-party AI assistants were operating inside customer accounts, sometimes beyond what users had instructed. According to Axios, which reported the activity on 22 October 2026, the access generally relied on login credentials customers had supplied themselves. Banks such as JPMorgan, Citi and Bank of America have reportedly blocked agents using customer banking credentials, while permitting limited read-only data sharing through approved providers. The restrictions followed a series of developments over several weeks, including the launch of Meta's Muse personal assistant with financial account connections. Officials have not confirmed how many agents accessed accounts or the total financial losses involved, so the advice for customers is to avoid sharing bank passwords with AI tools.