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CVE-2026-67413GHSA-chxf-3hfg-j8f7

rabbitmq-server: RabbitMQ: Authenticated RabbitMQ JMS Topic Selector Users Can Consume Broker CPU with an Unbounded LIKE Regular Expression

rabbitmq rabbitmq-server
Open in ThreatlineRecord JSON
CVSS
6.0Medium
ExploitationPublic exploit codeCISA's assessment says proof of concept code is public, assessed 29 Sep 2026. Not in the KEV catalogCISA via CVE List
Exploit odds (EPSS)0.42%Chance of exploitation activity in the next 30 days, higher than 35% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
Published25 Sep 2026Updated 29 Sep 2026CVE List

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

Description

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.

Text from CVE List

Affected versions 4

  • rabbitmq-serveraffected: >= 4.2.0, < 4.2.9CVE List
  • rabbitmq-serveraffected: >= 4.1.0, < 4.1.14CVE List
  • rabbitmq-serveraffected: >= 4.3.0, < 4.3.3CVE List
  • rabbitmq-serveraffected: >= 4.0.0, < 4.0.23CVE List

References 7