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OpenAI's Lockdown Mode: A New Shield Against Prompt Injection Attacks

OpenAI has introduced a new feature called Lockdown Mode to protect sensitive data from prompt injection attacks. Here’s what you need to know.

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Updated Jun 7, 2026
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OpenAI's Lockdown Mode: A New Shield Against Prompt Injection Attacks

OpenAI, the company behind AI-powered chatbots like ChatGPT, has unveiled a new security feature dubbed Lockdown Mode. This innovative tool is designed to offer additional protection against prompt injection attacks, where malicious instructions can be hidden in web content. With Lockdown Mode enabled, users can ensure that their sensitive data remains secure.

What exactly does Lockdown Mode do? Here are the key changes:

  • Live web browsing is disabled, meaning you can only access cached content.
  • The retrieval and display of images from the web are also restricted. However, users can still generate their own images using AI tools.
  • Deep research features are turned off to minimize risks associated with data leakage.
  • Agent mode, which allows for more advanced interactions, is disabled as well.

Despite these restrictions, OpenAI acknowledges that Lockdown Mode might not be foolproof. They state that even with this feature enabled, ChatGPT could still be vulnerable to prompt injection attacks in certain scenarios. For instance, malicious content could potentially appear in cached web data or uploaded files.

The primary goal of Lockdown Mode is to reduce the likelihood of sensitive information being shared inadvertently through these vulnerabilities. According to OpenAI, it is particularly suited for individuals and organizations that handle sensitive data and need stricter protection against potential data exfiltration risks.

OpenAI has started rolling out this feature to self-serve ChatGPT Business accounts as well as eligible personal accounts. However, not everyone will have access to Lockdown Mode just yet—it is intended for those who specifically request it due to the higher risk of sensitive data exposure.

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