CVE-2026-56816

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.

References

https://github.com/netty/netty/security/advisories/GHSA-hpcc-26xq-25fv

https://github.com/netty/netty/releases/tag/netty-4.2.16.Final

https://github.com/netty/netty/commit/5b68c61f37aa4a3045cba624cbea239655c9003b

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3

EPSS