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New HTTP/2 Bomb Vulnerability Allows Remote DoS on NGINX, Apache, IIS, Envoy & Cloudflare

thehackernews.com·Jun 3, 2026

A new HTTP/2 bomb vulnerability has been discovered that can enable remote denial-of-service (DoS) attacks on multiple web servers, including NGINX, Apache, IIS, Envoy, and Cloudflare. This security flaw poses significant risks for server security and requires immediate attention from affected organizations.

The most valuable insight for you is the discovery of a new HTTP/2 Bomb vulnerability that affects major web servers like NGINX, Apache, IIS, Envoy, and Cloudflare, potentially leading to remote denial-of-service (DoS) attacks. This highlights the urgent need for updating your threat intelligence protocols to include monitoring and mitigation strategies for this vulnerability, ensuring your organization's servers are not susceptible to exploitation.

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