CVE-2026-59899

CVE-2026-59899 (Netty) affects Netty versions prior to 4.1.136.Final and 4.2.16.Final, where HttpContentEncoder maintains an unbounded per-channel acceptEncodingQueue that can accumulate attacker-controlled data. The queue is filled on the I/O thread per inbound HTTP request and drained only when...

CVE-2026-59899 Netty HttpContentEncoder: Unbounded Per-Connection Queue Growth via HTTP/1.1 Pipelining Leads to Denial of Service

Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.136.Final and 4.2.16.Final, HttpContentEncoder the superclass of the production handler HttpContentCompressor maintains a per-channel ArrayDeque named acceptEncodingQueue that accumulates attacker-controll...

Netty: [HttpContentEncoder] Unbounded Per-Connection Queue Growth via HTTP/1.1 Pipelining Leads to Denial of Service

Impact HttpContentEncoder the superclass of the production handler HttpContentCompressor maintains a per-channel ArrayDeque named acceptEncodingQueue that accumulates attacker-controlled data without any size limit. The queue is filled on the I/O thread for every inbound HTTP request and drained...