Vulnerability Description
Memory Allocation with Excessive Size Value vulnerability in Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Client, Apache ActiveMQ Broker. An authenticated user can cause a broker DoS by sending a crafted OpenWire Message with a large encoded size value for the map. OpenWire message property maps are unmarshaled without size validation which can trigger OOM and crash the broker. This issue affects Apache ActiveMQ: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ All: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ Client: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ Broker: before 5.19.8, from 6.0.0 before 6.2.7. Users are recommended to upgrade to version 6.2.7 or 5.19.8, which fixes the issue.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Apache | Activemq | < 5.19.8 |
| Apache | Activemq Broker | < 5.19.8 |
Related Weaknesses (CWE)
References
- https://lists.apache.org/thread/grrd1mwgkgblqjbwkkq6dvmdxd9ov2dxVendor Advisory
- http://www.openwall.com/lists/oss-security/2026/06/29/14Third Party Advisory
FAQ
What is CVE-2026-53917?
CVE-2026-53917 is a vulnerability with a CVSS score of 7.5 (HIGH). Memory Allocation with Excessive Size Value vulnerability in Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Client, Apache ActiveMQ Broker. An authenticated user can cause a broker DoS by send...
How severe is CVE-2026-53917?
CVE-2026-53917 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-53917?
Check the references section above for vendor advisories and patch information. Affected products include: Apache Activemq, Apache Activemq Broker.