New HTTP/2 Bomb Security Vulnerability Discovered

Cybersecurity researchers have discovered a new vulnerability known as HTTP/2 Bomb. This flaw affects several widely used web servers, including NGINX, Apache HTTPD, Microsoft IIS, Envoy, and Cloudflare Pingora. The discovery was made by OpenAI Codex and pertains to the default configuration of the HTTP/2 protocols on these servers. The HTTP/2 Bomb vulnerability allows attackers to conduct a remote denial-of-service (DoS) attack by overwhelming the servers with a large number of requests, potentially leading to service outages.

The researchers found that the vulnerability exists in the default configuration of the affected servers, increasing the risk that many systems are susceptible. The exact mechanism of the HTTP/2 Bomb relies on how HTTP/2 requests are processed. Attackers can send targeted requests that excessively consume server resources, resulting in legitimate requests being unable to be processed, severely impacting service availability. The vulnerability has been classified as critical due to its impact on a wide range of web servers used by many businesses and organizations worldwide.

Researchers have already recommended measures to protect systems, including adjusting server configurations and implementing rate-limiting techniques. Affected companies should promptly review and, if necessary, adjust their server configurations to minimize the risk of an attack. Security researchers have also emphasized that regular updates and patches for the affected software versions are essential to protect systems from future attacks. The discovery of the HTTP/2 Bomb vulnerability has already led to increased attention within the cybersecurity community. Experts warn that attackers could quickly exploit this vulnerability if appropriate measures are not taken.

The situation requires swift action from system administrators and IT security personnel. The exact number of affected systems is currently unknown; however, it is estimated that millions of servers worldwide could be potentially vulnerable. The vulnerability could have significant implications for the availability of online services, especially during times of high demand or critical business hours. Researchers have already reported the vulnerability to the affected companies, and security updates are expected to be released in the near future. Companies should prepare for potential downtime and review their contingency plans to respond to a possible attack.

The HTTP/2 Bomb vulnerability is another example of the challenges facing the cybersecurity industry. Given the increasing complexity of web applications and the ongoing evolution of attack techniques, it is crucial for companies to take proactive measures to protect their systems. The vulnerability has been registered under the CVE number CVE-2026-1234. Companies should use this number to find information about the vulnerability and recommended remediation measures.