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[ARTICLE · art-134627] src=osintsights.com ↗ pub= topic=ai-agents verified=true sentiment=↓ negative

Malicious Extensions Exploit AI Browser Agents

Security researcher Gal Weizman has demonstrated a proof-of-concept called BragJack that lets a single malicious browser extension hand instructions to AI-powered browser agents in Chromium-based browsers, allowing the agent to act with the browser's existing privileges and putting a user's entire online presence at risk. The vulnerability hijacks AI assistants embedded in those browsers.

by read1 min views1 publishedSep 19, 2026

Imagine a single malicious browser extension handing an AI-powered browser agent a set of instructions, allowing it to act with the browser's existing privileges - and putting your entire online presence at risk. Security researcher Gal Weizman has uncovered this vulnerability with his proof-of-concept, BragJack, which can hijack AI assistants embedded in popular Chromium-based browsers.

source & further reading
osintsights.com — original article AI Model Exploits Chained Flaws to Breach OpenAI Staff Accounts Google Gemini Breaches Company Systems in Security Test Researchers Expose OpenAI Vulnerability Using Rival AI Model
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