CVE-2026-67412

Summary

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.

Affected Software

VendorProductVersion RangeStatus
rabbitmqrabbitmq-server>= 4.3.0, < 4.3.3affected
rabbitmqrabbitmq-server>= 4.2.0, < 4.2.9affected
rabbitmqrabbitmq-server>= 4.1.0, < 4.1.14affected
rabbitmqrabbitmq-server>= 4.0.0, < 4.0.24affected
rabbitmqrabbitmq-server>= 3.13.0, < 3.13.18affected

Weaknesses

  • CWE-862: CWE-862: Missing Authorization

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: poc
    • Automatable: no
    • Technical Impact: partial

Additional References

References