Improper access control in RabbitMQ Server - CVE-2026-57215
Published: June 25, 2026
Vulnerability identifier: #VU135153
CSH Severity: Medium
CVSS v4: 7.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-57215
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to inject messages into another tenant's reply channel and cause silent routing loss conditions.
The vulnerability exists due to improper access control in direct-reply-to binding handling when binding and unbinding volatile amq.rabbitmq.reply-to.* destinations. A remote user can create and retain a crafted binding to inject messages into another tenant's reply channel and cause silent routing loss conditions.
Exploitation requires normal bind and publish permissions in a shared virtual host.
Affected software
RabbitMQ Server
Fedora
rabbitmq-server
Fedora
rabbitmq-server
How to mitigate CVE-2026-57215
Install security update from vendor's website.
RabbitMQ Server - addressed in versions 3.13.15, 4.0.20, 4.1.11, 4.2.6
rabbitmq-server - update to 4.0.9-5.fc43
rabbitmq-server - update to 4.0.9-5.fc43