An issue in the HTTP/2 protocol allows for a denial of service (DoS) through server resource consumption. The flaw stems from the protocol's request multiplexing capability over a single TCP connection, where a client can send a `RST STREAM` frame to cancel a request. In a Rapid Reset attack, an attacker sends a rapid sequence of requests followed by immediate cancellations. This allows the attacker to bypass the server's maximum concurrent stream limit and overload the system, as the server still processes each request and generates logs before the reset occurs. This technique was exploited in the wild between August and October 2023, resulting in record-breaking Layer 7 DDoS attacks. For instance, Google Cloud observed peaks of 398 million requests per second, AWS over 155 million, and Cloudflare 201 million. These attacks can be executed using relatively small botnets of approximately 20,000 machines.