Researcher Demonstrates Proof-of-Concept Attack Gaining Control Over ChatGPT's Secure Sandbox

A researcher demonstrated a proof-of-concept attack chain at Black Hat USA 2026 that achieved command-and-control (C2)-style influence over ChatGPT’s isolated sandbox environment. The attack targeted the secure sandbox designed to contain ChatGPT’s operations, though no specific technical details, CVEs, or exact methods were disclosed in the report. The demonstration occurred during a session at the conference, highlighting a potential security weakness in the sandbox’s isolation mechanisms. No information was provided regarding the researcher’s identity, the scale of affected systems, or real-world exploitation. The impact described involves unauthorized control over the sandbox, though further specifics on consequences were not outlined.