Cloudflare Client-Side Security: smarter detection, now open to everyone

Cloudflare announces Client-Side Security using a GNN+LLM cascading classifier to detect malicious JavaScript with fewer false positives.

• •Assesses 3.5 billion scripts daily via browser reporting with zero latency impact on web applications.
• •A GNN analyzes JavaScript ASTs to identify malicious patterns regardless of obfuscation or minification.
• •An LLM on Workers AI reduces false positives ~3x overall and ~200x for unique scripts by filtering GNN flags.
• •Client-Side Security Advanced is now self-serve; domain-based threat intelligence is free for all customers.
• •The system caught a zero-day core.js exploit targeting home routers via compromised browser extensions.

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