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How to enable post-quantum cryptography and TLS termination with HAProxy
Every time a client connects to your server, a small negotiation happens before a single byte of application data moves. That negotiation, the TLS handshake, is what makes encrypted web traffic possible. It's also at risk of being recorded. Not the conten
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How Liftoff cut costs by 87% and latency by 75% with HAProxy
Liftoff, a mobile advertising company, processes 1.5 trillion bid requests every month. Their platform touches 275 million unique devices daily across 150 geographies. At that scale, the proxy layer is a core part of the business.For years, Liftoff relied
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June 2026 - CVE-2026-55204: null pointer dereference in HAProxy's HPACK header handling
On June 18, 2026, CVE-2026-55204 was published, reported by security researcher Tristan Madani and filed through a third-party CNA. It describes a null pointer dereference in HAProxy's HPACK (HTTP/2 header compression) handling: the hpack_dht_insert() fun
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AWS Summit London & NYC: what engineers want
Across two AWS Summit events in London and New York City, we had the chance to speak with more than 1,000 engineers. They came from startups building their first production stack, and enterprises managing large AWS and multi-cloud deployments. The energy
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How Clover moved beyond blue-green deployments with HAProxy Fusion Control Plane
Clover's platform handles more than just payments: inventory, employee management, online sales, and customer loyalty programs are all running on a single monolith called the Clover Operating System (COS). Releasing updates to that platform reliably and w
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Protecting against HTTP/2 Bomb vulnerability (CVE-2026-49975) with HAProxy
Executive summary (TL;DR)At a glanceThe issue: A critical resource-exhaustion vulnerability known as the "HTTP/2 Bomb" affects multiple major web servers, including NGINX, Apache HTTPD, Microsoft IIS, Envoy, and Cloudflare Pingora (CVE-2026-49975).Severit
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Announcing HAProxy 3.4
HAProxy 3.4 is a milestone release that significantly advances HAProxy's legendary flexibility, performance, security, reliability, and observability. Dynamic backend management simplifies integration with modern architectures, memory efficiency improves
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Subsecond data center failover at Weller Truck Parts with HAProxy One
Weller Truck Parts is the largest heavy-duty truck parts remanufacturer in North America. With 46 locations, over 1,150 employee-owners, and two on-premises data centers in Grand Rapids and Indianapolis, the company runs a complex infrastructure that its
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HAProxy Enterprise WAF protects against Drupal core SA-CORE-2026-004 SQL Injection (CVE-2026-9082)
On May 20th, 2026, the Drupal Security Team published a new advisory disclosing a security vulnerability report in the database driver of the Drupal content management system. The issue affects installations configured to use PostgreSQL as their database,
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How HAProxy built its modern application delivery architecture
Progressive programmability provides a proven blueprint for modernizationLet's be real: building reliable tech products is hard. Modernizing that same tech without compromising the user experience is even harder. The "rip and replace" approach to moderniz
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