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ChatGPT Sandbox Flaw Lets Attackers Steal Gmail Data Across Accounts via Hidden Channel

A covert cross-account communication channel inside ChatGPT let an attacker hijack a victim’s session and silently exfiltrate data from connected apps like Gmail, all while the victim saw nothing unusual in their conversation. The vulnerability exploited ChatGPT’s code-execution containers, isolated sandboxes the assistant uses when a task requires running code or installing software packages. These […]
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An investigation by Check Point revealed that an internal instance of Artifactory could serve as a hidden channel for a ChatGPT session to send instructions and extract data from someone else’s connected accounts. The infrastructure was removed, but the case exposes the risks of entrusting AI agents with simultaneous access to private code, services and files.

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According to an official publication by Check Point Research, in a report published today, a single command within a ChatGPT conversation could allow a cybercriminal to exploit it, while at the same time answering the user's questions. Based on what we understand, the critical element is not that […]

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A failure in ChatGPT discovered by Check Point Research revealed a particularly worrying scenario: malicious instructions could transform a

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Check Point Software broke the news on Tuesday, September 8, 2026.
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