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6.5 — HIGH

Firefox 154 blocks silent WebSocket access to local network devices

📅 19 August 2026 at 15:25 UTC📰 Cyber InsiderView original source ↗
Firefox 154 blocks silent WebSocket access to local network devices

Mozilla has released Firefox 154 with expanded protections against websites connecting to devices on local networks, new AI-assisted tab organization, and support for NVIDIA GeForce NOW on Windows. The latest update also addresses 58 CVE entries, including multiple high-severity memory safety, sandbox escape, and privilege-escalation vulnerabilities. Local network protections expand to WebSockets One of the … The post Firefox 154 blocks silent WebSocket access to local network devices appeared first on CyberInsider.

🤖 AI BriefingAuto-generated threat analysis
🔍Threat Overview

Mozilla released Firefox 154 with enhanced local network protections against WebSocket connections, addressing multiple high-severity vulnerabilities and expanding AI-assisted tab organization features.

⚙️Technical Details
💥Impact Assessment
Severity: High
Who Is at Risk
Users of Firefox 154 or later, particularly those with local network connections to devices on their network.
🛡️Recommended Actions
1Enable Local Network Access protections in Firefox settings
2Regularly update Firefox to the latest version
3Use a reputable ad blocker to mitigate potential tracking vulnerabilities
📦Affected Products
Product Name: FirefoxOperating Systems:WindowsmacOSLinux

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