Introducing the Vercel Web Application Firewall

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Introduces the Vercel Web Application Firewall (WAF) as a first-party, Vercel-native security layer at the edge. Key features include a customizable rules engine (path, user agent, IP, geolocation, JA4 fingerprints), framework-aware rules, managed rulesets for Enterprise, observability into security metrics, beta rate limiting, instant propagation (300ms), and instant rollback. The WAF integrates with Vercel's existing DDoS mitigation and Attack Challenge Mode, leveraging framework-defined infrastructure for application-aware security decisions.