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On June 2, 2026, security researchers disclosed a remote denial-of-service (DoS) exploit named the HTTP/2 Bomb. This flaw allows unauthenticated remote attackers to rapidly exhaust server memory, rendering major web servers inaccessible.

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 across a broader range of workloads, native cryptographic operations at the proxy layer open new possibilities for API security architectures, and OpenTelemetry support makes HAProxy a first-class participant in distributed tracing pipelines.