CVE-2026-67415RabbitMQ: Shovel Management Atom Exhaustion Allows Persistent Broker-Wide Denial of Service

Descripción

RabbitMQ is a messaging and streaming broker. From 4.2.0 until 4.2.9 and 4.3.3, the Shovel parameter parser converted attacker-controlled runtime parameter values into non-garbage-collected Erlang atoms before bounding them or checking a fixed allowlist. Exploitation requires network access to the Management HTTP API, valid credentials with both the management and policymaker tags, permission to set Shovel runtime parameters on a vhost, and the rabbitmq_shovel and rabbitmq_shovel_management plugins to be enabled. The attacker can exhaust the node-wide atom table and deny service, and malicious parameters are stored durably and reparsed when workers start, so atom pressure can recur after restart without a live attacker connection. This issue is fixed in versions 4.2.9 and 4.3.3.

Datos: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Se publican tal como los indican las fuentes, en inglés.

Productos y versiones afectados

Referencias y parches

• https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-8mpg-qw9r-m5cr Vendor AdvisoryExploitMitigation
• https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.9 Release Notes
• https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.3 Release Notes