GHSA-q4f6-jm68-57ww

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GHSA-q4f6-jm68-57ww

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

Details: ### Impact `HttpContentEncoder` (the superclass of the production handler `HttpContentCompressor`) maintains a per-channel `ArrayDeque<CharSequence>` 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 only when the application later writes a non-1xx response. This creates a resource exhaustion vulnerability when an attacker exploits HTTP/1.1 pipelining to flood the connection with requests faster than the application produces responses.

References: https://github.com/netty/netty/security/advisories/GHSA-q4f6-jm68-57ww, https://github.com/netty/netty, https://github.com/netty/netty/releases/tag/netty-4.1.136.Final, https://github.com/netty/netty/releases/tag/netty-4.2.16.Final