ChatGPT Flaw Let a Planted Prompt Send a Victim's Gmail Data to Another Account

The Hacker News

September 8, 2026 at 2:19 PM

Overview

A recent report from Check Point Research reveals a significant security flaw in ChatGPT that could allow attackers to exploit the AI's functionality. By embedding a covert instruction in a conversation, an attacker can manipulate ChatGPT to access a user's connected Gmail account and transfer sensitive data to another ChatGPT account without the user’s knowledge. This breach raises serious privacy concerns for users who rely on AI tools for assistance, as their personal information could be at risk. The ease with which this attack can be executed highlights the need for enhanced security measures in AI applications. Users and companies should be vigilant and consider the implications of using such technologies, especially where sensitive data is involved.

Key Takeaways

Affected Systems: ChatGPT, Gmail
Action Required: Users should avoid sharing sensitive information in ChatGPT conversations and stay informed about updates from OpenAI regarding security enhancements.
Timeline: Newly disclosed

Original Article Summary

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

Impact

ChatGPT, Gmail

Exploitation Status

The exploitation status is currently unknown. Monitor vendor advisories and security bulletins for updates.

Timeline

Newly disclosed

Remediation

Users should avoid sharing sensitive information in ChatGPT conversations and stay informed about updates from OpenAI regarding security enhancements.

Additional Information

This threat intelligence is aggregated from trusted cybersecurity sources. For the most up-to-date information, technical details, and official vendor guidance, please refer to the original article linked below.

Related Topics: This incident relates to Exploit, Vulnerability, Check Point.

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