CVE-2026-67415
RabbitMQ is a messaging and streaming broker
- Risk score
- 41/100
- CVSS
- 4.9 v3.1
- Exploit chance (30 days)
- 0.4%
- Published
- 25 Sep 2026
Open in the live forecast Today's forecast
What to know
- What it is
- 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,…
- Affected
- Broadcom Rabbitmq Server before 4.2.9, 4.3.3
- Fix
- Upgrade Broadcom Rabbitmq Server to 4.2.9 or 4.3.3 (whichever matches your release line), or later.
- Exploitation
- Public proof of concept
Why it is Yellow
- CVSS 4.9 medium
- Public exploit or proof of concept referenced
References
Original description
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.
Last activity 25 Sep 2026. Patch Forecast updates every hour.