Resource exhaustion in RabbitMQ Server - #VU137243
Published: July 9, 2026
Vulnerability identifier: #VU137243
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 denial of service.
The vulnerability exists due to uncontrolled resource consumption in auth_mechanism URI token processing in amqp_client when handling auth_mechanism query values. A remote privileged user can send a specially crafted request with a large number of colon-separated tokens to cause a denial of service.
Exploitation requires the Shovel or Federation plugin to be in use.
Affected software
RabbitMQ Server
Remediation
Install security update from vendor's website.
RabbitMQ Server - addressed in versions 3.13.15, 4.0.20, 4.1.11, 4.2.6