CVE-2026-67412
Description
RabbitMQ is a messaging and streaming broker. From 3.13.0 until 4.3.3, 4.2.9 , 4.1.14, 4.0.24, and 3.13.18, Federation upstream in RabbitMQ skips vhost authorization allowing cross-vhost message access. what the bug lets you do. A policymaker on one vhost reads and drains messages out of another vhost it has no permission on. With the default ack-mode the source messages are consumed (deleted), not copied. Why that should not 1. Federation validates the upstream URI without any vhost-access Cross-vhost message read/drain from a per-vhost policymaker, breaking vhost tenancy This issue is fixed in versions 4.3.3, 4.2.9 , 4.1.14, 4.0.24, and 3.13.18.
How to fix
- broadcom rabbitmq_server3.13.18, 4.0.24, 4.1.14, 4.2.9, 4.3.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| broadcom rabbitmq_server | 3.13.0 ≤ v < 3.13.18, 4.0.0 ≤ v < 4.0.24, 4.1.0 ≤ v < 4.1.14, 4.2.0 ≤ v < 4.2.9, 4.3.0 ≤ v < 4.3.3 | 3.13.18, 4.0.24, 4.1.14, 4.2.9, 4.3.3 |
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