CVE-2026-57212 rabbitmq CVE debrief

Who should care

Users of RabbitMQ, especially those using versions prior to 3.13.14, 4.0.19, 4.1.10, and 4.2.5, should be aware of this vulnerability and take steps to mitigate it. This includes operators, platform administrators, vulnerability management teams, and security teams who need to assess the impact on their deployments and plan for remediation.

Technical summary

The rabbitmq_management HTTP API in RabbitMQ accepts oversized valid JSON bodies on with_decode and direct_request paths due to inadequate size checks. Specifically, the read_complete_body function checks the accumulated size before the final chunk but not the final combined size. This issue can lead to potential denial-of-service attacks. The vulnerability is fixed in versions 3.13.14, 4.0.19, 4.1.10, and 4.2.5.

Defensive priority

High

Recommended defensive actions

• Upgrade to RabbitMQ version 3.13.14, 4.0.19, 4.1.10, or 4.2.5 or later
• Review and limit the size of JSON bodies sent to the rabbitmq_management HTTP API
• Monitor API usage for potential denial-of-service attacks
• Implement additional security measures such as rate limiting and IP blocking if necessary
• 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
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record was published on 2026-07-10T21:16:58.150Z and has not been modified since then. The NVD entry is currently 7.1 HIGH. Limited information is available about the specific details of the vulnerability, but it is known to affect RabbitMQ versions prior to 3.13.14, 4.0.19, 4.1.10, and 4.2.5. The rabbitmq_management HTTP API accepts oversized valid JSON bodies on with_decode and direct_request paths because read_complete_body checks the accumulated size before the final chunk but not the final combined size. Users should verify their RabbitMQ deployments for potential exposure and review official advisories for further details.

Official resources