Security Advisory

CVE-2026-56816

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-07-21 21:56:36

Last updated 2026-07-22 18:24:28

Assigner GitHub_M

CVSS score 7.5

State PUBLISHED

Description

Netty is a network application framework for development of protocol servers and clients. Prior to 4.2.16.Final, Netty's `Http3FrameCodec` buffers incoming data for HTTP/3 reserved frame types up to the wire-specified payload length without limits; `decodeFrame` trusts `payLoadLength`, allowing an attacker to open multiple QUIC streams and send reserved frames with very large payload lengths to cause memory exhaustion and denial of service. This issue is fixed in version 4.2.16.Final.

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