Resource exhaustion in RabbitMQ Server - CVE-2026-67229
Published: July 9, 2026 / Updated: September 28, 2026
Vulnerability identifier: #VU137237
CSH Severity: Low
CVSS v4: 6.9 [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]
CVE-ID: CVE-2026-67229
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 vhost metadata import handling when importing a crafted definitions file via the definitions API. A remote privileged user can submit a definitions import request containing a large number of unique metadata keys to cause a denial of service.
The issue is triggered during processing of vhost metadata keys with atomize_keys/1.
Affected software
RabbitMQ Server
How to mitigate CVE-2026-67229
Install security update from vendor's website.
RabbitMQ Server - addressed in versions 3.13.15, 4.0.20, 4.1.11, 4.2.6