CVE-2026-67227: rabbitmq server from 4.0.0 (inclusive), before 4.0.22 (exclusive), from 4.1.0 (inclusive), before 4.1.14 (exclusive)…

Affected technology

rabbitmq server · from 4.0.0 (inclusive), before 4.0.22 (exclusive)
broadcom

rabbitmq server · from 4.1.0 (inclusive), before 4.1.14 (exclusive)
broadcom

rabbitmq server · from 4.2.0 (inclusive), before 4.2.7 (exclusive)
broadcom

rabbitmq server · from 4.3.0 (inclusive), before 4.3.1 (exclusive)
broadcom

rabbitmq-server · >= 4.0.0, < 4.0.22, >= 4.1.0, < 4.1.14, >= 4.2.0, < 4.2.7, >= 4.3.0, < 4.3.1
rabbitmq

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 4.0): Network (remote) · High privileges required · No user interaction required

What an attacker can do

But below A user with the policymaker tag can crash the node by exhausting the atom table via repeated requests to /api/global-parameters/:name with unique :name Management plugin enabled policymaker tag ~1M HTTP. Vendor/CNA’s CVSS 4.0 assessment (base score 5.9/10) rates confidentiality and integrity impact as none; availability impact as high.