CVE-2011-4905: Apache ActiveMQ

Medium severity, CVSS 5.0. EPSS: 8.4% chance of exploitation in the next 30 days.

Apache ActiveMQ before 5.6.0 allows remote attackers to cause a denial of service (file-descriptor exhaustion and broker crash or hang) by sending many openwire failover:tcp:// connection requests.

Affected products

• Apache ActiveMQ: up to and including 5.5.1; version 1.1 only; version 1.2 only; version 1.3 only; version 1.4 only; version 1.5 only; …

Published 2012-01-05. Last modified 2026-06-16.