Agentic browsers

What is an agentic browser?

An agentic AI browser is a web client controlled by an AI agent that can read pages, reason over content, and autonomously take actions like navigating links, clicking buttons, filling forms, uploading or downloading files, and completing purchases. It uses tools and memory to plan multi-step workflows across tabs, sessions, and sites.

Why does security for agentic browsers matter?

Gartner says employees spend 85% of their day and tasks using a web browser. Security for agentic browsers matters because these AI-driven clients don’t just read the web, they act on it, so a single manipulated step can exfiltrate data, spend money, or change accounts in the real world.

Top risks of agentic browsers

• Prompt injection and instruction smuggling that alter plans inside page content
  
• Tool misuse and confused deputy where the agent uses privileged tools on an attacker’s behalf
  
• Cross-site data leakage and exfiltration through forms, downloads, and APIs
  
• Session hijacks and credential overreach from long-lived cookies or over-broad tokens
  
• Hallucinated actions that submit bad data or trigger unintended purchases