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GHSA-whxr-3p84-rf3c

Apache ActiveMQ: Unchecked buffer length can cause excessive memory allocation

Source: GitHub Advisory Database (reviewed) Moderate CVE-2025-27533

Packages

EcosystemPackageAffectedFixed in
Maven org.apache.activemq:activemq-openwire-legacy < 5.16.8 5.16.8
Maven org.apache.activemq:activemq-client < 5.16.8 5.16.8
Maven org.apache.activemq:activemq-openwire-legacy >= 5.17.0, < 5.17.7 5.17.7
Maven org.apache.activemq:activemq-openwire-legacy >= 5.18.0, < 5.18.7 5.18.7
Maven org.apache.activemq:activemq-openwire-legacy >= 6.0.0, < 6.1.6 6.1.6
Maven org.apache.activemq:activemq-client >= 5.17.0, < 5.17.7 5.17.7
Maven org.apache.activemq:activemq-client >= 5.18.0, < 5.18.7 5.18.7
Maven org.apache.activemq:activemq-client >= 6.0.0, < 6.1.6 6.1.6

Details

As written in the advisory (Markdown source, shown as plain text).

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.

References

External links from the advisory. They lead to third-party sites.