BragJack Attack Hijacks AI Assistants in 5 Popular Browsers With Zero Clicks
Researchers disclosed BragJack, a zero-click extension attack hijacking AI assistants in Chrome, Edge, Opera, Comet, and Claude.
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Vulnerability2 · 1 read
CVE-2026-0628
- CVSS 3.1
- 8.8 high
- EPSS
- 7%p93
- Published
- ·
- Modified
Description · NVD
Insufficient policy enforcement in WebView tag in Google Chrome prior to 143.0.7499.192 allowed an attacker who convinced a user to install a malicious extension to inject scripts or HTML into a privileged page via a crafted Chrome Extension. (Chromium security severity: High)
In the news
9 storiesBragJack Attack Lets Malicious Extensions Hijack AI Agents Across 5 Major Browsers
Researchers demonstrated 'BragJack' browser-extension attacks that hijack AI agents in Chrome, Edge, Comet, Opera Neon, and Claude, leading to two CVEs and vendor patches.
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BragJack attacks hijack AI browser agents through malicious extensions
Forever Security's Gal Weizman disclosed BragJack, a malicious-extension technique hijacking AI browser agents from Chrome Gemini to Claude, earning $20,000 in bounties.
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One Extension Could Hijack AI Assistants Across Chrome, Comet, Edge, Opera Neon and Claude
Researchers showed a single browser extension could hijack AI agents in Chrome, Edge, Comet, Opera Neon and Claude in Chrome, earning $20,000 in bounties.
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Microsoft Fixes 114 Windows Flaws in January 2026 Patch, One Actively Exploited
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