Hackers used ChatGPT to gather Gmail information through a ShadowLeak attack

A recent cybersecurity alert has unveiled a concerning vulnerability involving ChatGPT’s Deep Research tool, which hackers temporarily exploited. This incident, termed ShadowLeak, enabled the theft of Gmail data through a single hidden prompt, requiring no user actions like clicks or downloads. Researchers from Radware identified this zero-click vulnerability in June 2025, and OpenAI rolled out […]