Medium 5.3Published Jul 10, 2026

CVE-2026-57221RabbitMQ: Passive queue/exchange declaration bypasses authorization checks, leaking queue metadata to unprivileged users

Updated under an hour ago (Oct 27, 2026, 6:30 PM ET)

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It affects rabbitmq-server and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for rabbitmq-server

Exploited in the last 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.

CVSS: 5.3 MEDIUM (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N
Weakness (CWE): CWE-862
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Jul 13, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

rabbitmq rabbitmq-server rabbitmq:server (from the name)	from 4.2.0, < 4.2.6; from 4.1.0, < 4.1.11; from 4.0.0, < 4.0.21; from 3.13.0, < 3.13.15	CNA record
broadcom rabbitmq_server broadcom:rabbitmq_server	from 3.13.0 before 4.2.6	NVD

References

References

https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-9q2j-2hq8-22r2	x-refsource-confirm, exploit, vendor-advisory
https://github.com/rabbitmq/rabbitmq-server/pull/16085	x-refsource-misc, issue-tracking, patch
https://github.com/rabbitmq/rabbitmq-server/pull/16090	x-refsource-misc, issue-tracking, patch
https://github.com/rabbitmq/rabbitmq-server/commit/709a14e49e06c138a8cd672c9809ca34a2767962	x-refsource-misc, patch
https://github.com/rabbitmq/rabbitmq-server/commit/dc3d1aa4f5c3331a425ee599b45be9423a2e83fc	x-refsource-misc, patch
https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6	x-refsource-misc, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.