Medium · published July 11, 2026
RabbitMQ is a messaging and streaming broker. Prior to 3.13.15, 4.0.20, 4.1.11, and 4.2.6, AMQP 0-9-1, AMQP 1.0, and Stream Protocol authentication can allow a loopback-restricted user such as guest to connect remotely when traffic is accepted through a trusted PROXY-protocol path and the backend listener is loopback-bound because the loopback check uses the listener-side socket address instead of the real client source. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, and 4.2.6.
| Product | Versions | Fixed in |
|---|---|---|
| broadcom/rabbitmq_server | ≥ 3.13.0, < 3.13.15 | 3.13.15 |
| broadcom/rabbitmq_server | ≥ 4.0.0, < 4.0.20 | 4.0.20 |
| broadcom/rabbitmq_server | ≥ 4.1.0, < 4.1.11 | 4.1.11 |
| broadcom/rabbitmq_server | ≥ 4.2.0, < 4.2.6 | 4.2.6 |