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6.8 — HIGH

Firefox AI Chatbot feature exposed users to email theft risk

📅 17 June 2026 at 12:15 UTC📰 Cyber InsiderView original source ↗
Firefox AI Chatbot feature exposed users to email theft risk

A vulnerability in Firefox's AI chatbot integration could allow malicious websites to inject hidden instructions into AI prompts and extract data from connected services such as email accounts. Mozilla has implemented mitigations, though the researchers who discovered the problem say the underlying security issue extends beyond Firefox. The flaw was discovered in October 2025 by … The post Firefox AI Chatbot feature exposed users to email theft risk appeared first on CyberInsider.

🤖 AI BriefingAuto-generated threat analysis
🔍Threat Overview

A vulnerability in Firefox's AI chatbot integration allowed malicious websites to inject hidden instructions into AI prompts, potentially extracting data from connected services like email accounts.

⚙️Technical Details
💥Impact Assessment
Severity: High
Who Is at Risk
Users of Firefox with enabled AI chatbot integration and access to email and calendar services
🛡️Recommended Actions
1Carefully consider what permissions are granted to AI chatbots, particularly access to email, calendars, and other sensitive data sources.
2Regularly review and update browser settings to limit AI chatbot functionality.
3Use a reputable antivirus program to monitor for suspicious activity.
📦Affected Products
Product Name: FirefoxAffected Software: True

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