CVE-2026-67227
Description
RabbitMQ is a messaging and streaming broker. From 4.0.0 until 4.0.22 and 4.1.14 and 4.2.7 and 4.3.1, Atom exhaustion: toatom on global-parameter :name. resourceexists/2 (and the PUT/DELETE handlers) call rabbitdatacoercion:toatom/1 on the :name URL path segment. toatom/1 uses binarytoatom/2 (unsafe). The endpoint requires policymaker (not management, but below A user with the policymaker tag can crash the node by exhausting the atom table via repeated requests to /api/global-parameters/:name with unique :name Management plugin enabled policymaker tag ~1M HTTP. This issue is fixed in versions 4.0.22 and 4.1.14 and 4.2.7 and 4.3.1.
How to fix
- broadcom rabbitmq_server4.0.22, 4.1.14, 4.2.7, 4.3.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| broadcom rabbitmq_server | 4.0.0 ≤ v < 4.0.22, 4.1.0 ≤ v < 4.1.14, 4.2.0 ≤ v < 4.2.7, 4.3.0 ≤ v < 4.3.1 | 4.0.22, 4.1.14, 4.2.7, 4.3.1 |
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