Known denial-of-service (DoS) techniques can be chained together in a new exploit that can knock major web servers offline, Calif security researchers warn. Dubbed HTTP/2 Bomb and discovered using OpenAI’s Codex, the exploit combines a compression bomb that targets HTTP/2’s header compression scheme (HPACK) with a Slowloris-style hold that prevents the server from freeing memory. According to California-based cybersecurity firm Calif, the attack potentially affects over 880,000 websites that support HTTP/2 and run default NGINX, Apache HTTPD, Microsoft IIS, Envoy, or Cloudflare Pingora configurations. Furthermore, the company says, an attack can be launched from a home computer on a 100 Mbps connection and can render any of these servers unavailable within seconds. The techniques chained…