[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fdZYYwiJn83QWWRQD5Gz_8hB0GXxv3XTZPsFKrMDwzZ4":3},{"article":4,"iocs":37,"watch_terms":38},{"id":5,"title":6,"slug":7,"summary":8,"ai_summary":9,"brief":10,"full_text":10,"url":11,"image_url":12,"published_at":13,"ingested_at":14,"relevance_score":15,"entities":16,"category_id":17,"category":18,"article_tags":21},"213ba839-944c-4182-872c-2d36b4de273a","Malicious AI Assistant Extensions Harvest LLM Chat Histories","malicious-ai-assistant-extensions-harvest-llm-chat-histories","Malicious AI browser extensions collected LLM chat histories and browsing data from platforms such as ChatGPT and DeepSeek. With nearly 900,000 installs and activity across more than 20,000 enterprise tenants, the campaign highlights the growing risk of data exposure through browser extensions. The post Malicious AI Assistant Extensions Harvest LLM Chat Histories appeared first on Microsoft Security Blog.","A malicious browser extension campaign with nearly 900,000 installs targeted users of LLM platforms like ChatGPT and DeepSeek, harvesting chat histories and browsing data across more than 20,000 enterprise tenants. This campaign demonstrates an emerging attack vector exploiting the popularity of AI assistants through compromised browser extensions. The threat highlights significant data exposure risks in enterprise environments using generative AI tools.",null,"https:\u002F\u002Fwww.microsoft.com\u002Fen-us\u002Fsecurity\u002Fblog\u002F2026\u002F03\u002F05\u002Fmalicious-ai-assistant-extensions-harvest-llm-chat-histories\u002F","https:\u002F\u002Fwww.microsoft.com\u002Fen-us\u002Fsecurity\u002Fblog\u002Fwp-content\u002Fuploads\u002F2026\u002F03\u002FMS_Actional-Insights_Adversarial-AI.png","2026-03-05T16:02:12+00:00","2026-03-15T06:36:25.716027+00:00",8,[],"89f78b1c-3503-45a1-9fc7-e23d2ce1c6d5",{"id":17,"icon":10,"name":19,"slug":20},"Malware","malware",[22,27,32],{"category":23},{"id":24,"icon":10,"name":25,"slug":26},"614132b8-5837-4952-b8b5-c6c9a32a1d85","Privacy","privacy",{"category":28},{"id":29,"icon":10,"name":30,"slug":31},"839da5c1-3c34-47e2-9499-f7201640e3ac","AI Security","ai-security",{"category":33},{"id":34,"icon":10,"name":35,"slug":36},"e7b231c8-5f79-4465-8d38-1ef13aea5a14","Threat Intelligence","threat-intelligence",[],[]]