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securitySecurity/THREATS/CRIT

New 'HTTP/2 Bomb' DoS attack crashes web servers in under a minute

sourceBleeping Computer
calendar_todayJune 3, 2026
schedule2 min read
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EXECUTIVE SUMMARY

New 'HTTP/2 Bomb' DoS Attack Threatens Web Server Stability

Summary

A newly identified denial-of-service (DoS) attack, known as the HTTP/2 Bomb, can incapacitate web servers in mere seconds using a single machine. This attack exploits vulnerabilities in the HTTP/2 protocol to overwhelm server resources rapidly.

Key Points

  • The attack is named 'HTTP/2 Bomb' and targets the HTTP/2 protocol.
  • It can be executed from a single machine, making it highly accessible to attackers.
  • The attack can crash web servers in under a minute, posing a significant threat to online services.
  • The vulnerability affects web servers that support the HTTP/2 protocol.
  • The attack method involves overwhelming server resources, leading to a denial-of-service condition.

Analysis

The HTTP/2 Bomb attack is significant due to its ability to quickly and efficiently take down web servers, potentially affecting a wide range of online services. The ease with which this attack can be executed from a single machine increases its threat level, making it a critical concern for IT professionals managing web infrastructure. The attack highlights the need for robust security measures and updates to mitigate vulnerabilities in widely used protocols like HTTP/2.

Conclusion

IT professionals should prioritize reviewing and updating their web server configurations to mitigate the risk posed by the HTTP/2 Bomb attack. Implementing rate limiting and monitoring for unusual traffic patterns can help in early detection and prevention of such attacks.