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CVE-2026-67412BIT-RABBITMQ-2026-67412GHSA-42PC-678Q-V8QJ

RabbitMQ: Federation upstream skips vhost authorization allowing cross-vhost message access

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 4.3.3, 4.2.9, 4.1.14, 4.0.24, 3.13.18
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: poc
  • Automatable: no
  • Technical impact: partial

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.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: poc · Automatable: no · Technical impact: partial

  3. Record last updated

Affected versions

  • rabbitmq rabbitmq-server

    From 4.3.0 · fixed in 4.3.3; From 4.2.0 · fixed in 4.2.9; From 4.1.0 · fixed in 4.1.14; From 4.0.0 · fixed in 4.0.24; From 3.13.0 · fixed in 3.13.18

  • rabbitmqBitnami

    From 3.13.0 · fixed in 3.13.18; From 4.0.0 · fixed in 4.0.24; From 4.1.0 · fixed in 4.1.14; From 4.2.0 · fixed in 4.2.9; From 4.3.0 · fixed in 4.3.3

References 3

GitHub · rabbitmq/rabbitmq-server