CVE-2026-93575
Io.netty/netty-codec-mqtt: netty: resource exhaustion in mqttdecoder
- State
- Published
- Severity
- 7.5 High
- Published
- Sep 18, 2026
- Updated
- Sep 25, 2026
- Reserved
- Sep 18, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | redhat |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
Red Hat AMQ Broker 7Red Hat | |
Red Hat build of Apache Camel for Spring Boot 4Red Hat | |
Red Hat Fuse 7Red Hat | |
Red Hat JBoss Enterprise Application Platform 7Red Hat | |
Red Hat JBoss Enterprise Application Platform 7Red Hat | |
Red Hat JBoss Enterprise Application Platform 7Red Hat | |
Red Hat JBoss Enterprise Application Platform 7Red Hat | |
Red Hat Single Sign-On 7Red Hat |
References
- https://access.redhat.com/security/cve/CVE-2026-93575vdb-entry
- RHBZ#2536967issue-tracking
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