Bug 2541526 (CVE-2026-67413)

Summary: CVE-2026-67413 rabbitmq-server: rabbitmq-server: Denial of Service via unbounded regular expression evaluation in JMS topic exchange
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: eglynn, jjoyce, jpretori, jschluet, lhh, mburns, mgarciac
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in rabbitmq-server. An authenticated user with permissions to bind and publish messages can cause a Denial of Service (DoS) by submitting specially crafted pattern-matching expressions to the Java Message Service (JMS) topic exchange plugin. Because the message broker evaluates these regular expressions without recursion or execution limits, processing complex wildcards consumes excessive system processor resources, rendering the broker unresponsive to legitimate requests.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2566802    
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Description OSIDB Bzimport 2026-09-25 16:53:30 UTC 
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.