The vulnerability of the HttpClientCodec component in the networking application development framework allows attackers to compromise the integrity and accessibility of protected information, using Netty protocols.

The vulnerability of the HttpClientCodec component in the networking application development framework, used by servers and clients that utilize the Netty protocol, is related to deficiencies in HTTP request processing. Exploiting this vulnerability allows a malicious actor to compromise the...

CVE-2026-42584

Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, HttpClientCodec pairs each inbound response with an outbound request by queue.poll once per response, including for 1xx. If the client pipelines GET then HEAD and the server sends 103,...

UBUNTU-CVE-2026-42584

Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, HttpClientCodec pairs each inbound response with an outbound request by queue.poll once per response, including for 1xx. If the client pipelines GET then HEAD and the server sends 103,...

CVE-2026-42584 Netty: HttpClientCodec response desynchronization

Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, HttpClientCodec pairs each inbound response with an outbound request by queue.poll once per response, including for 1xx. If the client pipelines GET then HEAD and the server sends 103,...

GHSA-57RV-R2G8-2CJ3 Netty has HttpClientCodec response desynchronization

Summary If HttpClientCodec is configured, there are use cases when a response body from one request, can be parsed as another's. Details HttpClientCodec pairs each inbound response with an outbound request by queue.poll once per response, including for 1xx. If the client pipelines GET then HEAD a...

Netty has HttpClientCodec response desynchronization

Summary If HttpClientCodec is configured, there are use cases when a response body from one request, can be parsed as another's. Details HttpClientCodec pairs each inbound response with an outbound request by queue.poll once per response, including for 1xx. If the client pipelines GET then HEAD a...

HTTP Request Smuggling

Overview io.netty:netty-codec-http is a network application framework for rapid development of maintainable high performance protocol servers & clients. Affected versions of this package are vulnerable to HTTP Request Smuggling in the HttpClientCodec component. An attacker can cause response...