Check Point Research said in a report published today that a single instruction planted in a ChatGPT conversation could cause ChatGPT to quietly work for an attacker while answering the user's question as usual.

In the company's proof of concept, that hidden work read data from the user's connected Gmail account and passed it to a second ChatGPT account through a hidden channel



Source: TheHackerNews
Source Link: https://thehackernews.com/2026/09/chatgpt-flaw-let-planted-prompt-send.html