Two Malicious Chrome Extensions Steal ChatGPT and DeepSeek Chats from 900,000 Users

Two malicious Chrome extensions, named 'Chat GPT for Chrome with GPT-5, Claude Sonnet & DeepSeek AI' and 'AI Sidebar with Deepseek, ChatGPT, Claude, and more', have been discovered exfiltrating OpenAI ChatGPT and DeepSeek conversations from over 900,000 users. This article explores the details of these extensions, their impact on user privacy, and the potential consequences for those who have installed them.