The Shared Clipboard Inside the Sandbox: Cross-Account Data Leakage in ChatGPT

Research by: Alexey Bukhteyev

Key Takeaways

• Check Point Research discovered a covert cross-account command channel through which an attacker could use a victim’s ChatGPT session to execute hidden tasks with the tools, data, and connected apps available to that session. The victim could receive a normal answer to their visible request while the attacker’s task was processed separately and its result returned across accounts. In our proof of concept, ChatGPT retrieved email data from the victim’s connected Gmail account and relayed it to the attacker.
• The channel operated through code-execution environments belonging to different ChatGPT accounts. Although the containers could not access the public Internet or communicate directly, they could all reach the same internal service used to deliver software packages.