Inefficient Algorithmic Complexity Affecting io.netty:netty-codec-xml package, versions [,4.1.136.Final)[4.2.0.Alpha1,4.2.16.Final)
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Test your applications- Snyk IDSNYK-JAVA-IONETTY-18313176
- published26 Jul 2026
- disclosed24 Jul 2026
- creditUnknown
Introduced: 24 Jul 2026
New CVE NOT AVAILABLE CWE-407 (opens in a new tab)Common Weakness Enumeration (CWE) is a category system for software weaknesses
How to fix?
Upgrade io.netty:netty-codec-xml to version 4.1.136.Final, 4.2.16.Final or higher.
Overview
Affected versions of this package are vulnerable to Inefficient Algorithmic Complexity via the XmlFrameDecoder process. An attacker can cause the server's EventLoop thread to exhaust CPU resources and become unresponsive by sending a specially crafted XML payload, such as repeated </ characters, which forces the decoder to repeatedly rescan the entire buffer.