On October 14, 2025, Microsoft released a security update addressing CVE-2025-55315, a vulnerability in ASP.NET Core that allows HTTP request smuggling. While request smuggling is a known technique, ...

This site displays a prototype of a “Web 2.0” version of the daily Federal Register. It is not an official legal edition of the Federal Register, and does not replace the official print version or the ...

Want AI search engines and agents to find and use your content? Traditional SEO isn’t enough. AI systems process information differently. This guide breaks down key optimizations to help your content ...

Abstract: The Request Smuggling Via HTTP/2 Cleartext (H2C Smuggling) attacks exploit vulnerabilities in the handling of HTTP request headers by proxy servers, allowing attackers to bypass security ...

Beginning in September 2023, Microsoft was notified by industry partners about a newly identified Distributed Denial-of-Service (DDoS) attack technique being used in the wild targeting HTTP/2 protocol ...

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Add a description, image, and links to the xml-http-request topic page so that developers can more easily learn about it.