UBUNTU-CVE-2026-111821: Input Validation
Published Nov 4, 2026
·Updated
Improper input validation vulnerability in Apache ActiveMQ, Apache ActiveMQ KahaDB. A user can create a durable subscription with a clientId and subscription name that have a combined length > 65,535 (while separately being shorter) on a broker using KahaDB which can cause the broker to shutdown and be unrecoverable. This issue affects Apache ActiveMQ: from 6.0.0 before 6.3.3, before 5.19.12; Apache ActiveMQ KahaDB: from 6.0.0 before 6.3.3, before 5.19.12. Users are recommended to upgrade to version 6.4.0, 6.3.3 or 5.19.12, which fixes the issue.
Affected Software
7 affected components
ubuntu/activemq*
ubuntu/activemq*
ubuntu/activemq*
ubuntu/activemq*
ubuntu/activemq*
ubuntu/activemq*
ubuntu/activemq*
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Apache ActiveMQ KahaDBto a version that resolves this vulnerability.Fixed in 6.4.0
Event History
Nov 4, 2026
CVE Published
via OSV·10:17 AM
Data Sourced
via OSV·10:17 AM
DescriptionSeverityAffected Software