dev.to· Sep 24, 2026· by coridev

One Extension, Five Browsers, Zero Malicious Code: The Agent Hijack Nobody Priced In

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A single extension hit five different AI browser assistants and walked away with $20K in bounties...
🎯 Vulnerability: Web Security Vulnerability
💡 Defense Fix: Implement strict input validation, contextual output encoding, and enforce least-privilege authorization controls.
#security#ai#llm#appsec