CVE-2026-57217 rabbitmq CVE debrief

Who should care

Users of RabbitMQ, especially those who rely on topic authorization for secure messaging and streaming, should be aware of this vulnerability and take steps to update to a patched version. This includes operators, platform administrators, vulnerability management teams, and security teams who need to review and adjust topic authorization settings and monitor for unusual activity in RabbitMQ.

Technical summary

The vulnerability in RabbitMQ allows restricted topic writes and binds during metadata-store failures due to topic-permission lookup errors from Khepri collapsing to undefined. This issue has been fixed in versions 3.13.15, 4.0.21, 4.1.11, and 4.2.6. Users should update to one of these versions to mitigate the vulnerability. The vulnerability has a high severity score of 7 and is classified as HIGH. RabbitMQ is a messaging and streaming broker that is affected by this issue.

Defensive priority

High

Recommended defensive actions

• Update RabbitMQ to version 3.13.15, 4.0.21, 4.1.11, or 4.2.6
• Review and adjust topic authorization settings
• Monitor for unusual activity in RabbitMQ
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• 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 was published on 2026-07-10T21:16:58.810Z and has not been modified since then. The NVD entry is currently being processed. There is limited information available about the vulnerability, and defenders should verify the affected scope and severity with the vendor. The issue arises from topic-permission lookup errors from Khepri collapsing to undefined, which the internal backend treats as allow. This vulnerability is fixed in RabbitMQ versions 3.13.15, 4.0.21, 4.1.11, and 4.2.6. Users should review and adjust topic authorization settings and monitor for unusual activity in RabbitMQ.

Official resources