Missing Authorization in RabbitMQ Server - CVE-2026-66075
Published: July 9, 2026 / Updated: September 28, 2026
Vulnerability identifier: #VU137255
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-66075
CWE-ID: CWE-862
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 improper access control in the /federation-links/.../restart route when handling DELETE requests to restart federation links. A remote user can send a specially crafted DELETE request with monitoring-tag credentials to cause a denial of service.
Exploitation requires the rabbitmq_federation and rabbitmq_federation_management plugins to be enabled.
Affected software
RabbitMQ Server
How to mitigate CVE-2026-66075
Install security update from vendor's website.
RabbitMQ Server - addressed in versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, 4.3.1