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rabbitmq-server

RabbitMQ versions prior to 4.2.7 and 4.3.1 contain a vulnerability in the stream open handler that allows authenticated tenants to bypass operator-configured per-user and per-vhost connection limits by connecting via port 5552 instead of the standard AMQP port 5672. This occurs because the stream open handler only checks vhost access but omits node/vhost/user connection-limit checks enforced for AMQP connections. The issue is fixed in versions 4.2.7 and 4.3.1.

The RabbitMQ messaging and streaming broker has a vulnerability identified as CVE-2026-66067 affecting versions prior to 4.2.7 and 4.3.1. The stream open handler calls only check_vhost_access and omits connection-limit checks that are performed for AMQP connections. Consequently, an authenticated tenant can bypass per-user and per-vhost connection caps by connecting through port 5552 (stream protocol) instead of port 5672 (AMQP). This bypass undermines operator-configured connection limits intended for tenant isolation. The vulnerability requires the rabbitmq_stream plugin to be enabled and valid authenticated stream-protocol credentials. The issue is resolved in versions 4.2.7 and 4.3.1.

RabbitMQ versions prior to 4.2.7 and 4.3.1 contain a vulnerability in the stream open handler that allows authenticated tenants to bypass operator-configured per-user and per-vhost connection limits by connecting via port 5552 instead of the standard AMQP port 5672. This occurs because the stream op

Rabbitmq server: RabbitMQ is a messaging and streaming broker. (CVE-2026-66067)

Threats Tagged 'ubuntu-cve-2026-66067'

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Threats Tagged 'ubuntu-cve-2026-66067'

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