{"action":"Upgrade io.netty:netty-codec-mqtt to 4.1.133.Final (4.1.x) or 4.2.13.Final (4.2.x) or later.","affected":[{"fixed":"4.2.13.Final","introduced":"4.2.0.Alpha1"},{"fixed":"4.1.133.Final","introduced":"0"}],"component":"io.netty:netty-codec-mqtt","cve_ids":["CVE-2026-44248"],"ecosystem":"Maven","epss":0.00563,"exploited":false,"fixed_versions":["4.2.13.Final","4.1.133.Final"],"ghsa_id":"GHSA-jfg9-48mv-9qgx","id":"tcs_01M5N92RBZ7HGFRJE0EX3JK4DX","modified_at":"2026-09-10T03:51:06.220307671Z","published_at":"2026-05-07T05:14:14Z","references":["https://osv.dev/vulnerability/GHSA-jfg9-48mv-9qgx","https://github.com/netty/netty/security/advisories/GHSA-jfg9-48mv-9qgx","https://nvd.nist.gov/vuln/detail/CVE-2026-44248","https://docs.oasis-open.org/mqtt/mqtt/v5.0/os/mqtt-v5.0-os.html#_Toc3901027","https://github.com/netty/netty"],"severity":{"label":"medium","score":5.3},"sources":[{"source":"osv","source_id":"GHSA-jfg9-48mv-9qgx","url":"https://osv.dev/vulnerability/GHSA-jfg9-48mv-9qgx"}],"summary":"Netty MQTT: Resource exhaustion in MqttDecoder"}