A vulnerability was found in netty netty-codec-mqtt up to 4.1.133.Final/4.2.13.Final . It has been classified as problematic . This issue affects the function decodeVariableHeader of the component Properties Section . This manipulation causes resource consumption. This vulnerability is tracked as CVE-2026-44248 . The attack is possible to be carried out remotely. No exploit exists. Upgrading the affected component is recommended.