Resource exhaustion in RabbitMQ Server - #VU139301
Published: July 24, 2026
Vulnerability identifier: #VU139301
CSH Severity: Low
CVSS v4 BT: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: N/A
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to cause a persistent broker-wide denial of service.
The vulnerability exists due to uncontrolled resource consumption in the Shovel runtime parameter parser when handling management API requests that set Shovel runtime parameters. A remote privileged user can submit crafted Shovel parameter values with many unique atom-producing fields to cause a persistent broker-wide denial of service.
Only instances with the rabbitmq_shovel and rabbitmq_shovel_management plugins enabled are vulnerable. Stored malicious Shovel parameters can be reparsed after a broker restart, recreating atom pressure without another live request.
Affected software
RabbitMQ Server
Remediation
Install security update from vendor's website.
RabbitMQ Server - addressed in versions 4.2.9, 4.3.3