Uncontrolled Memory Allocation in ActiveMQ - CVE-2026-53917
Published: July 1, 2026
Vulnerability identifier: #VU136624
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-53917
CWE-ID: CWE-789
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Apache Foundation
Affected software:
ActiveMQ
ActiveMQ
Detailed vulnerability description
The vulnerability allows a remote user to cause a denial of service.
The vulnerability exists due to memory allocation with excessive size value in OpenWire message property map unmarshalling when processing a crafted OpenWire message with a large encoded map size value. A remote user can send a specially crafted OpenWire message to cause a denial of service.
The issue can trigger out-of-memory conditions and crash the broker.
How to mitigate CVE-2026-53917
Install security update from vendor's website.