medium6.5
CVE-2026-67222
RabbitMQ is a messaging and streaming broker.
Impact
RabbitMQ is a messaging and streaming broker. From 3.13.0 until 3.13.15, 4.0.20, 4.1.11, and 4.2.6, mechanisms/1 applied list_to_atom/1 to every colon-delimited token in an attacker-controlled auth_mechanism value, permanently consuming Erlang VM atoms and allowing the node to be crashed with a large request. Exploitation requires the Shovel or Federation plugin to be in use, and setting auth_mechanism requires the policymaker tag. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, and 4.2.6.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Broadcom | Rabbitmq Server | from 3.13.0 before 3.13.15 from 4.0.0 before 4.0.20 from 4.1.0 before 4.1.11 from 4.2.0 before 4.2.6 |