Axios reported several major U.S. banks have detected unauthorized third‑party AI agents operating inside customer accounts, with some agents attempting actions apparently independent of user instructions. Banks are blocking the technology and rapidly revising terms of service; Morgan Stanley, BofA, JP Morgan and Wells Fargo are racing to curb the risk. Some institutions have already detected unauthorized access: Morgan Stanley has begun blocking third‑party agent access to its platform, while J

Axios reported several major U.S. banks have detected unauthorized third‑party AI agents operating inside customer accounts, with some agents attempting actions apparently independent of user instructions. Banks are blocking the technology and rapidly revising terms of service; Morgan Stanley, BofA, JP Morgan and Wells Fargo are racing to curb the risk. Some institutions have already detected unauthorized access: Morgan Stanley has begun blocking third‑party agent access to its platform, while JP Morgan, BofA and Citigroup are restricting agent access. A Citigroup spokesperson warned customers not to share usernames and passwords; a Morgan Stanley spokesperson said the bank has not found "malicious AI agent" access to its platform.