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Block all AI browsers for the foreseeable future: Gartner

Gartner urges CISOs to block AI browsers due to risks like prompt-injection attacks and data leaks, with UK National Cyber Security Centre echoing concerns about persistent vulnerabilities.

  • Last week, Gartner advised chief information security officers to block all AI browsers in the foreseeable future in a report urging immediate cybersecurity action.
  • AI browser features often expose data because AI sidebars send active web content and browsing history to cloud-based AI back ends, while default AI browser settings prioritize user experience over security and agentic AI features face prompt injection attacks.
  • Gartner recommends organizations should assess back-end AI services, educate employees/users about data exposure, limit agent functions like email, and harden centrally managed security and privacy settings.
  • Vendors are already responding as Microsoft, OpenAI and Perplexity develop safeguards, Google Chrome taps the Gemini chatbot, and analysts warn employees who might automate tasks risk errors in procurement and sessions.
  • Gartner says sustainable policy will require organizations and enterprise security teams to perform risk assessments of AI browser back ends and manage prohibited use cases and monitoring obligations, as agentic browsers remain vulnerable to rogue agent actions.
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The market research and consulting company Gartner has issued a strong warning to companies: AI browsers, which automate documents in the network and process content by voice command, should be blocked completely for the time being. (Read more)

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The Register broke the news in on Monday, December 8, 2025.
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