CVE-2026-44891 Details
Description
Netty is a network application framework for development of protocol servers and clients. Prior to 4.1.136.Final and 4.2.16.Final, io.netty.handler.codec.stomp.StompSubframeDecoder fails to limit the total number of headers or their cumulative size per frame, and the maxLineLength parameter only restricts individual header lines. An attacker can send a large number of short headers that are accumulated in memory inside DefaultStompHeadersSubframe until the JVM throws an OutOfMemoryError, causing denial of service for servers exposing a STOMP endpoint based on StompSubframeDecoder. This issue is fixed in versions 4.1.136.Final and 4.2.16.Final.
A denial-of-service vulnerability has been identified in Netty versions prior to 4.1.136.Final and 4.2.16.Final. The issue arises in the STOMP subframe decoder, which fails to limit the total number of headers or their cumulative size per frame. While the 'maxLineLength' parameter restricts individual header lines, there is no mechanism to control the overall header count or size. This oversight allows attackers to send numerous short headers, which accumulate in memory and can eventually exhaust the Java Virtual Machine's resources, leading to an 'OutOfMemoryError' and causing service disruption on servers that expose a STOMP endpoint using the affected decoder.
Users can upgrade to Netty versions 4.1.136.Final or 4.2.16.Final, both of which include the necessary fix.
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 Jul 20, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-400 | Uncontrolled Resource Consumption | [email protected] |
| CWE-770 | Allocation of Resources Without Limits or Throttling | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| netty netty | < 4.1.136 >= 4.2.0, < 4.2.16 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 23, 2026 | Reanalysis | [email protected] |
| Jul 22, 2026 | Initial Analysis | [email protected] |
| Jul 20, 2026 | CVE Modified | CISA-ADP |
| Jul 17, 2026 | New CVE Received | [email protected] |