Executive Summary
OpenAI began rolling out ChatGPT Lockdown Mode for eligible personal accounts, limiting tools that could enable data exfiltration via prompt injection.
What Happened
OpenAI has begun rolling out a new Lockdown Mode to ChatGPT for eligible personal accounts to reduce the risk of data exfiltration arising from prompt injection attacks. The feature is primarily designed for people and organizations that handle sensitive data and require stricter protection guarantees. Lockdown Mode is available to logged-in users across Free, Go, Plus, and Pro, and
Affected Products
- OpenAI ChatGPT
Vulnerability / Attack Technique
Not applicable (security feature)
Technical Mechanism
The mode restricts tool access to reduce exfiltration paths.
AI Security Category
LLM01:2025 Prompt Injection
Part of the Prompt Injection topic.
Relevant Frameworks
RealGround Analysis
Restricting tools is the right lever. RealGround analysis: use Lockdown Mode for anyone handling sensitive data in ChatGPT.
Recommended Controls
- Enable Lockdown Mode for sensitive users
Related RealGround Service
Secure AI Agent Build · or start with the free AI Agent Security Scanner.
Sources
thehackernews.com: https://thehackernews.com/2026/06/new-chatgpt-lockdown-mode-limits-tools.html
Summary and analysis written by RealGround from the source above; last updated 2026-10-18.