CVE-2026-67413

What it is

RabbitMQ is a messaging and streaming broker. From 4.0.0 until 4.0.23, 4.1.14, 4.2.9, and 4.3.3, the optional rabbitmq_jms_topic_exchange plugin's x-jms-topic exchange accepted a client-controlled rjms_erlang_selector binding expression whose LIKE evaluator expanded percent and underscore wildcards into overlapping PCRE fragments. It executed those fragments with raw re:run/3 without match or recursion limits, allowing an authenticated tenant that can bind and publish to consume broker scheduler CPU and deny service with pathological selectors. This issue is fixed in versions 4.0.23, 4.1.14, 4.2.9, and 4.3.3.

At a glance

Exploitability

Can be exploited over the network with a low-privilege account. High risk of service disruption.

Exploit odds

0.5% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2026-09-25 17:17 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-10-16 16:02 UTC Last updatedMost recent change to the record

Details

Published

2026-09-25 17:17 UTC

Last modified

2026-10-16 16:02 UTC

Exploit probability

0.5% · EPSS, next 30 days

Weakness

CWE-1333

Record status

Analyzed

Affected

• Broadcom Rabbitmq Server < 4.0.23
• Broadcom Rabbitmq Server < 4.1.14
• Broadcom Rabbitmq Server < 4.2.9
• Broadcom Rabbitmq Server < 4.3.3

Attack profile CVSS 4.0 · 6.0

Attack vector

Network

Complexity

Low

Attack requirements

Present

Privileges needed

Low

User interaction

None

Confidentiality

None

Integrity

None

Availability

High