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Rabbitmq server: RabbitMQ is a messaging and streaming broker. (CVE-2026-67412)

0
Medium
VulnerabilityCVE-2026-67412gcveosvubuntu-cve-2026-67412cve-2026-67412ubuntu-pro-16-04-ltsubuntu-pro-18-04-ltsubuntu-pro-20-04-ltsubuntu-22-04-ltsubuntu-24-04-ltsubuntu-26-10ubuntu-26-04-lts
Published: 09/25/2026 (09/25/2026, 17:17:00 UTC)
Source: GCVE Database
Product: rabbitmq-server

Description

CVE-2026-67412 is a vulnerability in RabbitMQ server's Federation upstream feature that allows a policymaker on one virtual host (vhost) to read and drain messages from another vhost without proper authorization. This breaks the intended vhost tenancy isolation. The issue affects RabbitMQ versions from 3.13.0 up to but not including 4.3.3, 4.2.9, 4.1.14, 4.0.24, and 3.13.18, where it has been fixed.

CVSS v3.1

Score 7.1high

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
Low
Availability
None
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

Affected software

Ubuntu:Pro:16.04:LTSmore threats →ghsa
rabbitmq-server
pkg:deb/ubuntu/rabbitmq-server?arch=source&distro=esm-infra-legacy/xenial
Affected versions
=3.5.4-1=3.5.4-3=3.5.4-3.1=3.5.7-1=3.5.7-1ubuntu0.16.04.1=3.5.7-1ubuntu0.16.04.2=3.5.7-1ubuntu0.16.04.4=3.5.7-1ubuntu0.16.04.4+esm1=3.5.7-1ubuntu0.16.04.4+esm2=3.5.7-1ubuntu0.16.04.4+esm3
Ubuntu:Pro:18.04:LTSmore threats →ghsa
rabbitmq-server
pkg:deb/ubuntu/rabbitmq-server?arch=source&distro=esm-infra/bionic
Affected versions
=3.6.10-1=3.6.10-1ubuntu0.1=3.6.10-1ubuntu0.3=3.6.10-1ubuntu0.4=3.6.10-1ubuntu0.5=3.6.10-1ubuntu0.5+esm1
Ubuntu:Pro:20.04:LTSmore threats →ghsa
rabbitmq-server
pkg:deb/ubuntu/rabbitmq-server?arch=source&distro=esm-infra/focal
Affected versions
=3.7.8-4ubuntu2=3.7.18-1=3.8.2-0ubuntu1=3.8.2-0ubuntu1.1=3.8.2-0ubuntu1.2=3.8.2-0ubuntu1.3=3.8.2-0ubuntu1.4=3.8.2-0ubuntu1.5=3.8.3-0ubuntu0.1=3.8.3-0ubuntu0.2=3.8.3-0ubuntu0.3=3.8.3-0ubuntu0.3+esm1=3.8.3-0ubuntu0.3+esm2
Ubuntu:22.04:LTSmore threats →ghsa
rabbitmq-server
pkg:deb/ubuntu/rabbitmq-server?arch=source&distro=jammy
Affected versions
=3.8.9-3ubuntu1=3.9.8-1=3.9.8-2=3.9.8-3=3.9.8-5=3.9.8-6=3.9.13-1=3.9.13-1ubuntu0.22.04.1=3.9.13-1ubuntu0.22.04.2=3.9.27-0ubuntu0.1=3.9.27-0ubuntu0.2=3.9.27-0ubuntu0.5=3.9.27-0ubuntu0.6
Ubuntu:24.04:LTSmore threats →ghsa
rabbitmq-server
pkg:deb/ubuntu/rabbitmq-server?arch=source&distro=noble
Affected versions
=3.12.1-1=3.12.1-1ubuntu1=3.12.1-1ubuntu1.2=3.12.1-1ubuntu1.4=3.12.1-1ubuntu1.6=3.12.1-1ubuntu1.7
Ubuntu:26.10more threats →ghsa
rabbitmq-server
pkg:deb/ubuntu/rabbitmq-server?arch=source&distro=stonking
Affected versions
=4.0.5-10ubuntu5=4.3.2-4ubuntu2=4.3.2-4ubuntu3
Ubuntu:26.04:LTSmore threats →ghsa
rabbitmq-server
pkg:deb/ubuntu/rabbitmq-server?arch=source&distro=resolute
Affected versions
=4.0.5-8ubuntu2=4.0.5-10ubuntu1=4.0.5-10ubuntu2=4.0.5-10ubuntu3=4.0.5-10ubuntu4=4.0.5-10ubuntu5=4.0.5-10ubuntu5.1=4.0.5-10ubuntu5.2

Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.

AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 10/17/2026, 23:54:37 UTC

Technical Analysis

RabbitMQ's Federation upstream feature fails to properly enforce vhost authorization, allowing cross-vhost message access. Specifically, a policymaker on one vhost can read and consume messages from another vhost it does not have permission to access. The default acknowledgment mode causes source messages to be consumed (deleted) rather than copied, leading to unauthorized message draining. This vulnerability affects RabbitMQ versions from 3.13.0 until the fixed versions 4.3.3, 4.2.9, 4.1.14, 4.0.24, and 3.13.18.

Potential Impact

An attacker or user with policymaker privileges on one vhost can bypass vhost isolation and read or drain messages from another vhost without authorization. This compromises message confidentiality and integrity between vhosts. The messages are consumed from the source, resulting in potential data loss for the affected vhost. There is no indication of impact on availability or privilege escalation beyond the cross-vhost message access.

Mitigation Recommendations

This vulnerability is fixed in RabbitMQ versions 4.3.3, 4.2.9, 4.1.14, 4.0.24, and 3.13.18. Users should upgrade to one of these versions or later to remediate the issue. No other mitigation or workaround is indicated in the advisory.

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Technical Details

Gcve Source
db.gcve.eu
Osv Id
UBUNTU-CVE-2026-67412
Osv Schema Version
1.7.0
Ecosystems
["Ubuntu:Pro:16.04:LTS","Ubuntu:Pro:18.04:LTS","Ubuntu:Pro:20.04:LTS","Ubuntu:22.04:LTS","Ubuntu:24.04:LTS","Ubuntu:26.10","Ubuntu:26.04:LTS"]
Cvss Version
3.1
State
PUBLISHED

Threat ID: 6ad3f5a72cdf04f6566627d6

Added to database: 10/17/2026, 22:24:39 UTC

Last enriched: 10/17/2026, 23:54:37 UTC

Last updated: 10/17/2026, 23:54:37 UTC

Views: 2

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