Affected versions: - Apache ActiveMQ 6.0.0 before 6.1.6 - Apache ActiveMQ 5.18.0 before 5.18.7 - Apache ActiveMQ 5.17.0 before 5.17.7 - Apache ActiveMQ 5.16.0 before 5.16.8
Description: Memory Allocation with Excessive Size Value vulnerability in Apache ActiveMQ. During unmarshalling of OpenWire commands the size value of buffers was not properly validated which could lead to excessive memory allocation and be exploited to cause a denial of service (DoS) by depleting process memory, thereby affecting applications and services that rely on the availability of the ActiveMQ broker when not using mutual TLS connections. This issue affects Apache ActiveMQ: from 6.0.0 before 6.1.6, from 5.18.0 before 5.18.7, from 5.17.0 before 5.17.7, before 5.16.8. ActiveMQ 5.19.0 is not affected. Users are recommended to upgrade to version 6.1.6+, 5.19.0+, 5.18.7+, 5.17.7, or 5.16.8 or which fixes the issue. Existing users may implement mutual TLS to mitigate the risk on affected brokers. This issue is being tracked as AMQ-6596 References: https://activemq.apache.org/ https://www.cve.org/CVERecord?id=CVE-2025-27533 https://issues.apache.org/jira/browse/AMQ-6596 --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@activemq.apache.org For additional commands, e-mail: users-h...@activemq.apache.org For further information, visit: https://activemq.apache.org/contact
