CVE-2026-44892 | Netty is a network application framework for development of … | CVSS 7.5 HIGH

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.

Metadata

CVE ID: CVE-2026-44892
State: PUBLISHED
Assigner: GitHub_M
Reserved: 2026-05-07 21:50 UTC
Published: 2026-06-12 05:04 UTC
Last updated: 2026-06-12 09:59 UTC
Primary CWE: CWE-400
CWE-400: Uncontrolled Resource Consumption
Vendor / Product: netty / netty
Sources: cve.org · NVD

Severity & Metrics

7.5 HIGH CVSS 3.1

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

SSVC — CISA Coordinator

Exploitation: none
Automatable: yes
Tech. Impact: partial

Affected products (1)

Vendor	Product	Platform	Versions
netty	netty	—	>= 4.2.0.Final, < 4.2.15.Final

Weakness (CWE)

CWE	Source	Description
CWE-1188	cna	CWE-1188: Insecure Default Initialization of Resource
CWE-400	cna	CWE-400: Uncontrolled Resource Consumption

CVSS scores (1)

Score	Severity	Version	Source	Vector
7.5	HIGH	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References (2)

https://github.com/netty/netty/security/advisories/GHSA-c2rx-5r8w-8xr2 https://github.com/netty/netty/security/advisories/GHSA-c2rx-5r8w-8xr2
https://github.com/netty/netty/releases/tag/netty-4.2.15.Final https://github.com/netty/netty/releases/tag/netty-4.2.15.Final