CVE-2026-67222
RabbitMQ: list_to_atom on auth_mechanism URI tokens in amqp_client
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-400 |
| Vendor | rabbitmq |
| Product | rabbitmq-server |
| Published | Sep 25, 2026 |
Stay Ahead of the Next One
Get instant alerts for rabbitmq rabbitmq-server
Be the first to know when new unknown vulnerabilities affecting rabbitmq rabbitmq-server are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
Affected Versions
rabbitmq / rabbitmq-server
>= 3.13.0, < 3.13.15 >= 4.0.0, < 4.0.20 >= 4.1.0, < 4.1.11 >= 4.2.0, < 4.2.6