Resource exhaustion in Rabbitmq Rabbitmq-Server
CVE-2026-67226
RabbitMQ is a messaging and streaming broker. From 4.0.0 until 4.0.22 and 4.1.14 and 4.2.7, Admin-only atom exhaustion: PUT /api/users tags list. settags/2 maps rabbitdatacoercion:toatom/1 over the user's tags list. The 20 MB management body limit fits ~3-4M short tag strings. An administrator can crash the node in a single request by creating a user (or importing definitions) with ~1M unique tag administrator. This issue is fixed in versions 4.0.22 and 4.1.14 and 4.2.7.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
EPSS exploit prediction
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Affected products
- Rabbitmq Rabbitmq-Server — versions >= 4.0.0, < 4.0.22, >= 4.1.0, < 4.1.14, >= 4.2.0, < 4.2.7