CVE-2026-67415 rabbitmq CVE debrief

Who should care

RabbitMQ administrators and users with the management and policymaker tags should assess their exposure and prioritize patching to prevent potential denial-of-service attacks. Defenders should review RabbitMQ version and configuration, limit permissions for users with the management and policymaker tags, and monitor instances for unusual activity.

Why it matters

CVE-2026-67415 is a RabbitMQ vulnerability that can lead to a denial-of-service attack. Defenders should prioritize patching and review permissions to prevent potential attacks.

• Denial of service due to atom table exhaustion
• Potential for recurring atom pressure after restart without a live attacker connection
• Need to verify RabbitMQ version and configuration
• Requirement to limit permissions for users with the management and policymaker tags

Technical summary

The Shovel parameter parser in RabbitMQ converts attacker-controlled runtime parameter values into non-garbage-collected Erlang atoms before bounding them or checking a fixed allowlist. This can be exploited by an attacker with network access to the Management HTTP API, valid credentials, and permission to set Shovel runtime parameters on a vhost, leading to a denial-of-service attack. The vulnerability affects RabbitMQ instances with the management and policymaker tags enabled, and defenders should prioritize patching to prevent potential denial-of-service attacks.

Defensive priority

Defenders should prioritize patching RabbitMQ instances, especially those with the management and policymaker tags enabled, to prevent potential denial-of-service attacks.

Recommended defensive actions

• Patch RabbitMQ instances to versions 4.2.9 or 4.3.3
• Review and limit permissions for users with the management and policymaker tags
• Monitor RabbitMQ instances for unusual activity
• Verify RabbitMQ version and configuration
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, including its impact and fixed versions. However, additional information on potential exploitation or affected systems is limited. Defenders should verify RabbitMQ version and configuration, limit permissions for users with the management and policymaker tags, and monitor instances for unusual activity. The vulnerability can be exploited by an attacker with network access to the Management HTTP API, valid credentials, and permission to set Shovel runtime parameters on

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.