CVE-2026-44892

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/netty/netty/releases/tag/netty-4.2.15.Final	Release Notes
https://github.com/netty/netty/security/advisories/GHSA-c2rx-5r8w-8xr2	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:netty:netty:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-06-12 05:16

Updated : 2026-06-17 10:51

NVD link : CVE-2026-44892

Mitre link : CVE-2026-44892

CVE.ORG link : CVE-2026-44892

JSON object : View

Products Affected

netty

netty

CWE

CWE-400

Uncontrolled Resource Consumption

CWE-1188

Initialization of a Resource with an Insecure Default

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