---
id: CVE-2026-67412
title: RabbitMQ is a messaging and streaming broker
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
  policy…
severity: high
cvss: 7.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N'
cwe:
  - CWE-862
  - CWE-639
vendor: broadcom
product: rabbitmq_server
affected:
  - 'rabbitmq_server >= 3.13.0, < 3.13.18'
  - 'rabbitmq_server >= 4.0.0, < 4.0.24'
  - 'rabbitmq_server >= 4.1.0, < 4.1.14'
  - 'rabbitmq_server >= 4.2.0, < 4.2.9'
  - 'rabbitmq_server >= 4.3.0, < 4.3.3'
patched:
  - rabbitmq_server 4.3.3
published: '2026-09-25'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T16:44:57.637'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-67412'
references:
  - url: 'https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.9'
    label: security-advisories@github.com
  - url: 'https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.3'
    label: security-advisories@github.com
  - url: >-
      https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-42pc-678q-v8qj
    label: security-advisories@github.com
  - url: >-
      https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-42pc-678q-v8qj
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-67412.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-67412'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2541507'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-67412'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-67412'
  - url: 'https://access.redhat.com/errata/RHSA-2026:67552'
tags:
  - nvd
  - cve.org
  - exploit-available
  - csaf
  - vex
  - red-hat
epss: 0.00263
epssPercentile: 0.17982
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-25T16:44:37.491195Z'
scores:
  nvd: 7.1
  cna: 6
  vendor: 6.5
ingestedAt: '2026-09-25T17:13:14.015Z'
---

## Overview

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

- `rabbitmq_server >= 3.13.0, < 3.13.18`
- `rabbitmq_server >= 4.0.0, < 4.0.24`
- `rabbitmq_server >= 4.1.0, < 4.1.14`
- `rabbitmq_server >= 4.2.0, < 4.2.9`
- `rabbitmq_server >= 4.3.0, < 4.3.3`

## Remediation

Upgrade past the affected range:

- `rabbitmq_server 4.3.3`

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Hardened Images, Red Hat OpenStack Platform 13 (Queens), Red Hat OpenStack Platform 16.2, Red Hat OpenStack Platform 17.1, Red Hat OpenStack Platform 18.0 · no fix planned: Red Hat OpenStack Platform 13 (Queens), Red Hat OpenStack Platform 16.2, Red Hat OpenStack Platform 17.1, Red Hat Hardened Images, … · updated 2026-09-26 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-67412.json)
- **RHSA-2026:67552** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-09-15 · [advisory](https://access.redhat.com/errata/RHSA-2026:67552)