Vulnerability in Red Hat Amq Broker 7
CVE-2026-93575
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.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
Weakness classification (CWE)
References
- secalert@redhat.com (x_refsource_REDHAT, vdb-entry)
- secalert@redhat.com (x_refsource_REDHAT, issue-tracking)
Frequently asked questions
- What is CVE-2026-93575?
- CVE-2026-93575 is a high-severity vulnerability in Red Hat Amq Broker 7, classified under CWE-1035. CVSS score: 7.5/10. Published 2026-09-18.
- How severe is CVE-2026-93575?
- High severity. CVSS v3 base score is 7.5 out of 10.