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http2

Safeguard articles tagged "http2" — guides, analysis, and best practices for software supply chain and application security.

7 articles

Vulnerability Management

HTTP/2 CONTINUATION Flood: Inside CVE-2024-27316 and the Frame-Based DoS Class

A single TCP connection with no END_HEADERS flag was enough to crash major HTTP/2 servers — worse than Rapid Reset, and it took the industry a decade to check for it.

Jul 8, 20267 min read
Application Security

Hardening HTTP/2 against protocol-level DoS attacks

HTTP/2 Rapid Reset hit Google with 398 million requests per second in 2023 — a single protocol quirk, not a bug in any one server, drove the largest DDoS ever disclosed.

Jul 8, 20266 min read
Application Security

The security cost of long-lived HTTP connections

Keep-alive and HTTP/2 multiplexing cut handshake overhead but hold server resources open per connection — Slowloris and 2023's Rapid Reset attacks both exploited exactly that tradeoff.

Jul 8, 20266 min read
Vulnerability Analysis

HTTP/2 Rapid Reset (CVE-2023-44487) Explained

A protocol-level flaw in HTTP/2 turned a normal feature into the largest DDoS attacks ever recorded. Here is how Rapid Reset works and which library versions fix it.

Jul 1, 20266 min read
DevSecOps

netty-codec-http2 in Maven: Vulnerabilities and Fixes

The netty-codec-http2 Maven artifact powers HTTP/2 in gRPC, Spring, and countless services. Here are the CVEs that matter, the safe versions, and how to find it in your tree.

Jun 17, 20256 min read
AppSec

Eclipse Jetty Vulnerabilities: What to Patch and When

Jetty's HTTP/2 handling and older 9.4.x branches have carried real denial-of-service and information-disclosure CVEs — here's what a jetty 9.4.41 exploit actually looks like and which versions close it.

Mar 18, 20256 min read
Security

Nginx 1.14.2: Which Vulnerabilities Affect It and How to Upgrade

Nginx/1.14.2 is an end-of-life release carrying the resolver heap overwrite, HTTP/2 DoS flaws, and a request-smuggling bug. Here is what applies and the upgrade path.

Jan 28, 20255 min read

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http2 — Safeguard Blog