Integer overflow in ActiveMQ - CVE-2026-40046
Published: April 10, 2026
Vulnerability identifier: #VU125790
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-40046
CWE-ID: CWE-190
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to integer overflow or wraparound in the MQTT control packet remaining length field handling when parsing MQTT control packets. A remote attacker can send a specially crafted MQTT control packet to cause a denial of service.
Affected software
ActiveMQ
IBM Sterling Control Center
IBM Qradar SIEM
openEuler
activemq
activemq-javadoc
IBM Sterling Control Center
IBM Qradar SIEM
openEuler
activemq
activemq-javadoc
How to mitigate CVE-2026-40046
Install security update from vendor's website.
ActiveMQ - update to 6.2.4
IBM Sterling Control Center - addressed in versions 6.3.1.0.8, 6.4.1.0.2, 6.4.2.0.3
IBM Qradar SIEM - update to 7.5.0 Update Pack 15 IF05
activemq - update to 5.19.6-1
activemq-javadoc - update to 5.19.6-1
IBM Sterling Control Center - addressed in versions 6.3.1.0.8, 6.4.1.0.2, 6.4.2.0.3
IBM Qradar SIEM - update to 7.5.0 Update Pack 15 IF05
activemq - update to 5.19.6-1
activemq-javadoc - update to 5.19.6-1
External References
Related Security Bulletins
- Multiple vulnerabilities in Apache ActiveMQ
- openEuler 24.03 LTS SP3 update for activemq
- openEuler 24.03 LTS SP1 update for activemq
- openEuler 24.03 LTS update for activemq
- openEuler 22.03 LTS SP4 update for activemq
- Multiple vulnerabilities in IBM Sterling Control Center
- Multiple vulnerabilities in IBM QRadar SIEM