---
id: 241
title: "HTTP/1.1 Must Die: What This Means for AppSec Leadership"
source_domain: portswigger.net
source_url: "https://portswigger.net/blog/http-1-1-must-die-what-this-means-for-appsec-leadership"
published_at: "2025-08-06T22:23:49Z"
tags: ["appsec", "request-smuggling", "http1-must-die", "burp-suite-dast", "enterprise-security", "http2"]
phying_url: "https://phying.com/item/241"
lang: en
---

# HTTP/1.1 Must Die: What This Means for AppSec Leadership

## Summary

What AppSec leaders should take from HTTP/1.1 Must Die: desync attacks remain a systemic protocol-level threat, and auditing with Burp Suite DAST plus moving to upstream HTTP/2 is the fix.

## Intelligence Metadata

- **Sources:** portswigger.net
- **Published:** 2025-08-06T22:23:49Z
- **Original:** https://portswigger.net/blog/http-1-1-must-die-what-this-means-for-appsec-leadership
- **Phying News:** https://phying.com/item/241