Systems have been caught out that review pull requests, that’s a simple and clear one. The more obvious to me for most people is anything you do that interacts with your email without an explicit approve list of emails to read.
Yes, but none of this applies to the local codex agent that runs when I tell it to and has access to my computer. Like: „scan this folder of PDFs and create an excel file with all expenses. Then enter them into my tax software.“ This needs access to very sensitive data and involves a quite complex handling of data. But the only attack vector I see is someone injecting prompts into my invoice files.
Which applies if you were to do this to invoices submitted to you, rather than ones you created, or if you have any way of user info getting into your invoices.