Next.js vulnerabilities trigger Cloudflare warning
Cloudflare says multiple React Server Components and Next.js vulnerabilities were disclosed today, and urges developers to patch immediately. Its WAF managed rules already mitigate the disclosed denial-of-service cases for proxied traffic, but the company says that is not a substitute for upgrading.
This is a textbook layered-defense story: edge mitigation buys time, but the real fix still lives in the framework/runtime layer.
- –The blast radius sits in Next.js App Router and React Server Components, so teams using RSC need to inventory affected versions now.
- –Cloudflare’s managed rules help only when traffic is actually going through its WAF, so direct-origin deployments do not get that safety net.
- –Repeated RSC security issues are turning server components into an ongoing security tax for the ecosystem.
- –If you run Next.js, treat this as an upgrade-and-verify event, not a “WAF handled it” event.
DISCOVERED
1d ago
2026-05-07
PUBLISHED
1d ago
2026-05-07
RELEVANCE