CVE-2026-44892 Details
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.
A denial-of-service vulnerability has been identified in the Netty HTTP/3 codec, specifically in versions 4.2.0.Final prior to 4.2.15.Final. The issue arises from the default configuration of the 'Http3ConnectionHandler', which does not enforce a maximum header size limit. When a peer fails to specify 'HTTP3_SETTINGS_MAX_FIELD_SECTION_SIZE', the default remains unbounded. This allows a malicious client or server to send a vast number of headers, causing memory exhaustion and an 'OutOfMemoryError'.
Users can upgrade to Netty version 4.2.15.Final, which includes the necessary patch. This version is available on the Netty GitHub Releases page.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jun 12, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/netty/netty/releases/tag/netty-4.2.15.Final | [email protected] | Release Notes |
| https://github.com/netty/netty/security/advisories/GHSA-c2rx-5r8w-8xr2 | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-1188 | Initialization of a Resource with an Insecure Default | [email protected] |
| CWE-400 | Uncontrolled Resource Consumption | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| netty netty | >= 4.2.0, < 4.2.15 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jun 15, 2026 | Initial Analysis | [email protected] |
| Jun 12, 2026 | New CVE Received | [email protected] |