Allocation of Resources Without Limits or Throttling in RabbitMQ Server - #VU151000
Published: September 18, 2026
Vulnerability identifier: #VU151000
CSH Severity: Low
CVSS v4: 6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-770
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to cause a denial of service.
The vulnerability exists due to allocation of resources without limits or throttling in the MQTT retained message store when processing retained message publications. A remote user can retain-publish messages to unlimited distinct topics to cause a denial of service.
The rabbitmq_mqtt plugin must be enabled.
Affected software
RabbitMQ Server
Remediation
Install security update from vendor's website.
RabbitMQ Server - update to 4.3.5