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.

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-548235ea3b advisory.

    More CVEs

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    Fixed CVE-2026-44839

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of RabbitMQ installed on the remote host is affected by multiple vulnerabilities:

  - RabbitMQ allows foreign bindings to amq.rabbitmq.reply-to destinations because volatile direct-reply-to queues can     be accepted at bind and route time but are missing from Khepri-backed deletion checks, leaving persistent route     entries after unbind. (CVE-2026-57215)

  - RabbitMQ does not perform authorization checks on passive queue.declare and exchange.declare AMQP operations,     allowing any authenticated user to enumerate all queue and exchange names in a virtual host and read queue message     counts and consumer counts. (CVE-2026-57221)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2026-57221)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
333505	Fedora 43 : rabbitmq-server (2026-548235ea3b)	Nessus	Fedora Local Security Checks	Local	high
327582	RabbitMQ 3.13.x < 3.13.15 / 4.0.x < 4.0.20 / 4.1.x < 4.1.11 / 4.2.x < 4.2.6 AMQP Authorization Bypass	Nessus	Misc.	Local	high
326546	Linux Distros Unpatched Vulnerability : CVE-2026-57221	Nessus	Misc.	Local	medium

Detections

Analytics

CVE-2026-57221

medium

Tenable Plugins

high

high

medium