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Rabbitmq server: RabbitMQ is a messaging and streaming broker. (CVE-2026-67405)

0
Medium
VulnerabilityCVE-2026-67405gcveosvubuntu-cve-2026-67405cve-2026-67405ubuntu-pro-16-04-ltsubuntu-pro-18-04-ltsubuntu-pro-20-04-ltsubuntu-22-04-ltsubuntu-24-04-ltsubuntu-26-04-lts
Published: 09/23/2026 (09/23/2026, 21:17:00 UTC)
Source: GCVE Database
Product: rabbitmq-server

Description

RabbitMQ versions prior to 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.0 contain a vulnerability where the Web-MQTT and Web-STOMP handlers do not validate the Origin header on WebSocket upgrades. When configured with ssl_cert_login=true or use_http_auth=true, this can allow an attacker's JavaScript running in a victim's browser to authenticate as the victim. The issue does not affect default configurations and is fixed in the stated versions.

CVSS v4.0

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
Present
Privileges Required
None
User Interaction
Passive
Vuln. Confidentiality
None
Vuln. Integrity
None
Vuln. Availability
None
Subsq. Confidentiality
High
Subsq. Integrity
High
Subsq. Availability
None
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA: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:26.04: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, 23:56:15 UTC

Technical Analysis

RabbitMQ messaging broker versions before 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.0 have a vulnerability in the Web-MQTT and Web-STOMP WebSocket handlers due to lack of Origin header validation during WebSocket upgrade. Under non-default configurations (ssl_cert_login=true or use_http_auth=true), an attacker can leverage this to authenticate as the victim via malicious JavaScript in the victim's browser. The vulnerability is resolved in the specified fixed versions.

Potential Impact

An attacker with JavaScript execution in a victim's browser can authenticate as the victim to RabbitMQ services when non-default authentication configurations are enabled. This could lead to unauthorized access to messaging services. The vulnerability is harmless under default in-band CONNECT credential configurations.

Mitigation Recommendations

Upgrade RabbitMQ to versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, or 4.3.0 or later, where this issue is fixed. If upgrading is not immediately possible, review and avoid using the non-default configurations use_http_auth=true or ssl_cert_login=true for Web-STOMP and Web-MQTT plugins respectively, as the vulnerability requires these settings to be enabled.

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Technical Details

Gcve Source
db.gcve.eu
Osv Id
UBUNTU-CVE-2026-67405
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:26.04:LTS"]
Cvss Version
4.0
State
PUBLISHED

Threat ID: 6ad3f5a92cdf04f6566627e3

Added to database: 10/17/2026, 22:24:41 UTC

Last enriched: 10/17/2026, 23:56:15 UTC

Last updated: 10/17/2026, 23:56:15 UTC

Views: 2

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