CVE-2026-44892 | THREATINT

Description

Netty is a network application framework for development of protocol servers and clients. Prior to version 4.2.15.Final, the default configuration of the `Http3ConnectionHandler` in the Netty HTTP/3 codec lacks an enforced maximum header size limit. When a peer does not explicitly specify `HTTP3_SETTINGS_MAX_FIELD_SECTION_SIZE`, the implementation defaults to an unbounded limit. This insecure default configuration allows a malicious client or server to send an enormous number of headers, leading to a memory exhaustion Denial of Service via an `OutOfMemoryError`. Version 4.2.15.Final contains a patch.

PUBLISHED Reserved 2026-05-07 | Published 2026-06-12 | Updated 2026-06-12 | Assigner GitHub_M

HIGH: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Problem types

CWE-400: Uncontrolled Resource Consumption

CWE-1188: Insecure Default Initialization of Resource

Product status

>= 4.2.0.Final, < 4.2.15.Final
affected

References

github.com/…/netty/security/advisories/GHSA-c2rx-5r8w-8xr2

github.com/netty/netty/releases/tag/netty-4.2.15.Final

cve.org (CVE-2026-44892)

nvd.nist.gov (CVE-2026-44892)

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