BragJack Attack Lets Malicious Extensions Hijack AI Agents Across 5 Major Browsers
Sat Sep 19 2026
AI & ML
Attack
Browser
Malware
Vulnerability
cybersecuritynews.com
A new attack technique dubbed “BragJack” allows a malicious browser extension to seize trusted communication channels used by AI assistants in Chrome, Edge, Opera Neon, Comet, and Claude in Chrome. Rather than bypassing model guardrails or hiding instructions inside web content, the proof-of-concept attacks directly supplied commands to privileged browser components, turning an assistant into […]
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