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 SUSE Linux SLES16 / SLES_SAP16 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:23869-1 advisory.

    - CVE-2026-44839: XSS in management UI due to unsanitized vhost names (bsc#1266465).
    - CVE-2026-57212: The rabbitmq_management HTTP API accepts oversized valid JSON bodies on with_decode and     direct_request       paths (bsc#1271318).
    - CVE-2026-57213: stored XSS in RabbitMQ federation management plugin via unsanitized consumer_tag     rendering       (bsc#1271336).
    - CVE-2026-57214: stored XSS in RabbitMQ management UI (bsc#1271337).
    - CVE-2026-57215: direct-reply-to binding persistence can lead to unauthorized reply-channel injection and     persistent       phantom (bsc#1271338).
    - CVE-2026-57216: stream Protocol loopback enforcement can lead to remote guest sessions due to listener-     address       loopback checks (bsc#1271339).
    - CVE-2026-57217: topic authorization can lead to cross-tenant routing-key bypass (bsc#1271340).
    - CVE-2026-57218: consumer persistence can lead to post-revocation message disclosure in OAuth2     (bsc#1271343).
    - CVE-2026-57219: Unauthenticated disclosure of OAuth client credentials via an HTTP API endpoint with     certain less       common OAuth 2 configurations (bsc#1271344).
    - CVE-2026-57220: stream listener does not enforce configured frame-size limit during authentication,     permitting       unauth'd mem-exhaust DoS (bsc#1271345).
    - CVE-2026-57221: passive queue/exchange declaration bypasses authorization checks, leaking queue metadata     to       unprivileged users (bsc#1271346).

Tenable has extracted the preceding description block directly from the SUSE 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 remote openSUSE 16 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:21903-1 advisory.

    - CVE-2026-44839: XSS in management UI due to unsanitized vhost names (bsc#1266465).
    - CVE-2026-57212: The rabbitmq_management HTTP API accepts oversized valid JSON bodies on with_decode and     direct_request       paths (bsc#1271318).
    - CVE-2026-57213: stored XSS in RabbitMQ federation management plugin via unsanitized consumer_tag     rendering       (bsc#1271336).
    - CVE-2026-57214: stored XSS in RabbitMQ management UI (bsc#1271337).
    - CVE-2026-57215: direct-reply-to binding persistence can lead to unauthorized reply-channel injection and     persistent       phantom (bsc#1271338).
    - CVE-2026-57216: stream Protocol loopback enforcement can lead to remote guest sessions due to listener-     address       loopback checks (bsc#1271339).
    - CVE-2026-57217: topic authorization can lead to cross-tenant routing-key bypass (bsc#1271340).
    - CVE-2026-57218: consumer persistence can lead to post-revocation message disclosure in OAuth2     (bsc#1271343).
    - CVE-2026-57219: Unauthenticated disclosure of OAuth client credentials via an HTTP API endpoint with     certain less       common OAuth 2 configurations (bsc#1271344).
    - CVE-2026-57220: stream listener does not enforce configured frame-size limit during authentication,     permitting       unauth'd mem-exhaust DoS (bsc#1271345).
    - CVE-2026-57221: passive queue/exchange declaration bypasses authorization checks, leaking queue metadata     to       unprivileged users (bsc#1271346).

Tenable has extracted the preceding description block directly from the SUSE 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 remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-548235ea3b advisory.

    More CVEs

    ----

    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
350832	SUSE SLES16: erlang-rabbitmq-client / rabbitmq-server / etc (SUSE-SU-2026:23869-1)	Nessus	SuSE Local Security Checks	Local	high
350157	openSUSE 16: erlang-rabbitmq-client / rabbitmq-server / etc (openSUSE-SU-2026:21903-1)	Nessus	SuSE Local Security Checks	Local	high
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

high

high

medium