{"api_version":"1","generated_at":"2026-09-25T09:24:40+00:00","cve":"CVE-2026-93575","urls":{"html":"https://cve.report/CVE-2026-93575","api":"https://cve.report/api/cve/CVE-2026-93575.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-93575","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-93575"},"summary":{"title":"Io.netty/netty-codec-mqtt: netty: resource exhaustion in mqttdecoder","description":"A flaw was found in Netty's MqttDecoder. An unauthenticated remote attacker can exploit this vulnerability by sending a specially crafted MQTT CONNECT packet. The decoder fails to properly validate the 'Properties Length' against the 'Remaining Length', allowing an attacker to bypass size limits. This leads to excessive memory and CPU consumption, resulting in a denial of service (DoS) due to an OutOfMemoryError.","state":"PUBLISHED","assigner":"redhat","published_at":"2026-09-18 11:17:22","updated_at":"2026-09-22 15:17:23"},"problem_types":["CWE-1035","CWE-1035 CWE-1035"],"metrics":[{"version":"3.1","source":"secalert@redhat.com","type":"Secondary","score":"7.5","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"CVSS","score":"7.5","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","data":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"references":[{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2536967","name":"https://bugzilla.redhat.com/show_bug.cgi?id=2536967","refsource":"secalert@redhat.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://access.redhat.com/security/cve/CVE-2026-93575","name":"https://access.redhat.com/security/cve/CVE-2026-93575","refsource":"secalert@redhat.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-93575","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93575","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Red Hat","product":"Red Hat AMQ Broker 7","version":"","platforms":[]},{"source":"CNA","vendor":"Red Hat","product":"Red Hat build of Apache Camel for Spring Boot 4","version":"","platforms":[]},{"source":"CNA","vendor":"Red Hat","product":"Red Hat Fuse 7","version":"","platforms":[]},{"source":"CNA","vendor":"Red Hat","product":"Red Hat JBoss Enterprise Application Platform 7","version":"","platforms":[]},{"source":"CNA","vendor":"Red Hat","product":"Red Hat JBoss Enterprise Application Platform 7","version":"","platforms":[]},{"source":"CNA","vendor":"Red Hat","product":"Red Hat JBoss Enterprise Application Platform 7","version":"","platforms":[]},{"source":"CNA","vendor":"Red Hat","product":"Red Hat JBoss Enterprise Application Platform 7","version":"","platforms":[]},{"source":"CNA","vendor":"Red Hat","product":"Red Hat Single Sign-On 7","version":"","platforms":[]}],"timeline":[{"source":"CNA","time":"2026-09-10T00:53:24.000Z","lang":"en","value":"Reported to Red Hat."},{"source":"CNA","time":"2026-09-10T00:53:24.000Z","lang":"en","value":"Made public."}],"solutions":[],"workarounds":[{"source":"CNA","title":"","value":"See https://github.com/netty/netty/security/advisories/GHSA-jqf3-r9ww-c5x8 for fixed versions and remediation guidance.","time":"","lang":"en"}],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"93575","cve":"CVE-2026-93575","epss":"0.003870000","percentile":"0.326810000","score_date":"2026-09-22","updated_at":"2026-09-23 00:06:33"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"metrics":[{"other":{"content":{"id":"CVE-2026-93575","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","timestamp":"2026-09-22T14:18:05.993557Z","version":"2.0.3"},"type":"ssvc"}}],"providerMetadata":{"dateUpdated":"2026-09-22T14:18:56.894Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"title":"CISA ADP Vulnrichment"}],"cna":{"affected":[{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:amq_broker:7"],"defaultStatus":"affected","packageName":"netty-codec-mqtt","product":"Red Hat AMQ Broker 7","vendor":"Red Hat"},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:camel_spring_boot:4"],"defaultStatus":"affected","packageName":"netty-codec-mqtt","product":"Red Hat build of Apache Camel for Spring Boot 4","vendor":"Red Hat"},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:jboss_fuse:7"],"defaultStatus":"affected","packageName":"netty-codec-mqtt","product":"Red Hat Fuse 7","vendor":"Red Hat"},{"collectionURL":"https://access.redhat.com/jbossnetwork/restricted/listSoftware.html","cpes":["cpe:/a:redhat:jboss_enterprise_application_platform:7"],"defaultStatus":"affected","packageName":"jboss-eap-7/eap74-els-openjdk11-openshift-rhel8","product":"Red Hat JBoss Enterprise Application Platform 7","vendor":"Red Hat"},{"collectionURL":"https://access.redhat.com/jbossnetwork/restricted/listSoftware.html","cpes":["cpe:/a:redhat:jboss_enterprise_application_platform:7"],"defaultStatus":"affected","packageName":"jboss-eap-7/eap74-els-openjdk17-openshift-rhel8","product":"Red Hat JBoss Enterprise Application Platform 7","vendor":"Red Hat"},{"collectionURL":"https://access.redhat.com/jbossnetwork/restricted/listSoftware.html","cpes":["cpe:/a:redhat:jboss_enterprise_application_platform:7"],"defaultStatus":"affected","packageName":"jboss-eap-7/eap74-els-openjdk8-openshift-rhel8","product":"Red Hat JBoss Enterprise Application Platform 7","vendor":"Red Hat"},{"collectionURL":"https://access.redhat.com/jbossnetwork/restricted/listSoftware.html","cpes":["cpe:/a:redhat:jboss_enterprise_application_platform:7"],"defaultStatus":"affected","packageName":"netty-codec-mqtt","product":"Red Hat JBoss Enterprise Application Platform 7","vendor":"Red Hat"},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:red_hat_single_sign_on:7"],"defaultStatus":"affected","packageName":"netty-codec-mqtt","product":"Red Hat Single Sign-On 7","vendor":"Red Hat"}],"datePublic":"2026-09-10T00:53:24.000Z","descriptions":[{"lang":"en","value":"A flaw was found in Netty's MqttDecoder. An unauthenticated remote attacker can exploit this vulnerability by sending a specially crafted MQTT CONNECT packet. The decoder fails to properly validate the 'Properties Length' against the 'Remaining Length', allowing an attacker to bypass size limits. This leads to excessive memory and CPU consumption, resulting in a denial of service (DoS) due to an OutOfMemoryError."}],"metrics":[{"other":{"content":{"namespace":"https://access.redhat.com/security/updates/classification/","value":"Important"},"type":"Red Hat severity rating"}},{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"format":"CVSS"}],"problemTypes":[{"descriptions":[{"cweId":"CWE-1035","description":"CWE-1035","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-09-18T20:12:15.535Z","orgId":"53f830b8-0a3f-465b-8143-3b8a9948e749","shortName":"redhat"},"references":[{"tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-93575"},{"name":"RHBZ#2536967","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2536967"}],"timeline":[{"lang":"en","time":"2026-09-10T00:53:24.000Z","value":"Reported to Red Hat."},{"lang":"en","time":"2026-09-10T00:53:24.000Z","value":"Made public."}],"title":"Io.netty/netty-codec-mqtt: netty: resource exhaustion in mqttdecoder","workarounds":[{"lang":"en","value":"See https://github.com/netty/netty/security/advisories/GHSA-jqf3-r9ww-c5x8 for fixed versions and remediation guidance."}],"x_generator":{"engine":"cvelib 1.8.0"},"x_redhatCweChain":"CWE-1035"}},"cveMetadata":{"assignerOrgId":"53f830b8-0a3f-465b-8143-3b8a9948e749","assignerShortName":"redhat","cveId":"CVE-2026-93575","datePublished":"2026-09-18T10:53:48.089Z","dateReserved":"2026-09-18T10:32:41.197Z","dateUpdated":"2026-09-22T14:18:56.894Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-18 11:17:22","lastModifiedDate":"2026-09-22 15:17:23","problem_types":["CWE-1035","CWE-1035 CWE-1035"],"metrics":{"cvssMetricV31":[{"source":"secalert@redhat.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-09-22T14:18:05.993557Z","id":"CVE-2026-93575","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"93575","Ordinal":"1","Title":"Io.netty/netty-codec-mqtt: netty: resource exhaustion in mqttdec","CVE":"CVE-2026-93575","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"93575","Ordinal":"1","NoteData":"A flaw was found in Netty's MqttDecoder. An unauthenticated remote attacker can exploit this vulnerability by sending a specially crafted MQTT CONNECT packet. The decoder fails to properly validate the 'Properties Length' against the 'Remaining Length', allowing an attacker to bypass size limits. This leads to excessive memory and CPU consumption, resulting in a denial of service (DoS) due to an OutOfMemoryError.","Type":"Description","Title":"Io.netty/netty-codec-mqtt: netty: resource exhaustion in mqttdec"}]}}}