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netty

A denial of service vulnerability exists in Netty's HttpServerCodec component. An unauthenticated remote attacker can exploit this by sending pipelined HTTP/1.1 requests on a single connection and withholding reads, causing an unbounded queue growth that leads to excessive heap memory consumption and service disruption. This flaw affects multiple specific versions of Netty. No official fix or mitigation meeting Red Hat's criteria is currently available.

CVE-2026-93491 is a denial of service vulnerability in Netty's HttpServerCodec. The vulnerability arises when an attacker pipelines HTTP/1.1 requests on a single connection and withholds reading responses, causing the methodOverflowQueue to grow without limit. This unbounded queue growth leads to unbounded heap memory consumption, resulting in memory exhaustion and denial of service. The issue affects multiple specific Netty versions as listed. Red Hat's advisory confirms the absence of an effective mitigation or fix that meets their criteria at this time.

Detailed information about A flaw was found in Netty's HttpServerCodec. (CVE-2026-93491) affecting null netty. Get real-time updates, technical details, and mit

A flaw was found in Netty's HttpServerCodec. (CVE-2026-93491) - Live Threat Intelligence - Threat Radar | OffSeq.com

A flaw was found in Netty's HttpServerCodec. (CVE-2026-93491)

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