SB2026030411 - Denial of service in Apache ActiveMQ
Published: March 4, 2026
Security Bulletin ID
SB2026030411
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Integer overflow (CVE-ID: CVE-2025-66168)
The vulnerability allows a remote user to perform a denial of service attack.
The vulnerability exists due to integer overflow within the MQTT module when decoding malformed packets. A remote user can send specially crafted packets to the application, trigger an integer overflow and perform a denial of service attack. Note, the vulnerability does not affect brokers with not enabled MQTT transport connectors.
Remediation
Install update from vendor's website.