CVE-2026-57221: Broadcom Rabbitmq Server

Medium severity, CVSS 5.0. EPSS: 0.4% chance of exploitation in the next 30 days.

RabbitMQ is a messaging and streaming broker. Prior to 3.13.15, 4.0.20, 4.1.11, and 4.2.6, RabbitMQ does not perform authorization checks on passive queue.declare and exchange.declare AMQP 0-9-1 operations, allowing any authenticated user who can connect to a virtual host to enumerate queue and exchange names and read queue message and consumer counts. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, and 4.2.6.

Affected products

• Broadcom Rabbitmq Server: from 3.13.0, before 4.2.6 (fixed in 4.2.6)

Published 2026-07-10. Last modified 2026-07-13.