US Banks Fear Rogue AI Agents Inside Customer Accounts

Several users are giving AI assistants banking credentials to check balances or make transfers, and U.S. banks including JPMorgan, Bank of America, Wells Fargo and Morgan Stanley are responding to unauthorized AI agents detected inside customer accounts; some agents contacted bank call centers. No confirmed bank-account losses have been documented. On October 13, JPMorgan CFO Jeremy Barnum warned that customers who share login credentials with agents that take unwanted actions would bear responsibility, while U.S. rules limit liability for qualifying unauthorized electronic transfers but leave autonomous agents' treatment uncertain. Morgan Stanley has reportedly begun blocking third-party agents and says it has not observed rogue agents on its platforms; JPMorgan, Bank of America and Citi are restricting access.