Memory Allocation Vulnerability in Apache ActiveMQ and Related Products
CVE-2026-53917

7.5HIGH

Key Information:

Vendor

Apache
Status
Apache ActiveMQ
Apache ActiveMQ All
Apache ActiveMQ Client
Apache ActiveMQ Broker
Vendor
CVE Published:
30 June 2026

What is CVE-2026-53917?

A vulnerability has been identified in Apache ActiveMQ and its associated products that allows authenticated users to exploit the system by sending specially crafted OpenWire Messages. These messages can contain an excessively large encoded size value for a map, leading to a denial of service (DoS) condition. The affected message property maps are unmarshaled without proper size validation, which may result in an out-of-memory (OOM) situation that crashes the broker. To mitigate this issue, users are advised to upgrade to version 6.2.7 or 5.19.8, where the vulnerability has been addressed.

Affected Version(s)

Apache ActiveMQ 0 < 5.19.8

Apache ActiveMQ 6.0.0 < 6.2.7

Apache ActiveMQ All 0 < 5.19.8

References

https://lists.apache.org/thread/grrd1mwgkgblqjbwkkq6dvmdx...
vendor-advisory

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

tonghuaroot
.