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#Lockdown Mode

Vulnerabilities6 min read

ChatGPT preview flaw let attackers bypass Lockdown Mode and quietly send chats out; OpenAI has fixed it

Check Point found a gap in ChatGPT's HTML preview sandbox that defeated Lockdown Mode and could leak chat history and files. OpenAI says it deployed a fix by September 18, 2026.

OpenAIPrompt InjectionData Exfiltration