CVE-2026-57216 Details
Description
RabbitMQ is a messaging and streaming broker. Prior to 3.13.15, 4.0.20, 4.1.11, and 4.2.6, AMQP 0-9-1, AMQP 1.0, and Stream Protocol authentication can allow a loopback-restricted user such as guest to connect remotely when traffic is accepted through a trusted PROXY-protocol path and the backend listener is loopback-bound because the loopback check uses the listener-side socket address instead of the real client source. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, and 4.2.6.
A vulnerability in RabbitMQ's AMQP 0-9-1, AMQP 1.0, and Stream Protocol authentication mechanisms can allow a loopback-restricted user, such as 'guest', to connect remotely. This issue arises when traffic is accepted through a trusted PROXY-protocol path, and the backend listener is loopback-bound. The vulnerability exists because the loopback check uses the listener-side socket address instead of the actual client source. As a result, an authenticated 'guest' user can obtain a live AMQP session, potentially escalating to full broker control in deployments where 'guest' retains default admin privileges.
Users can upgrade to RabbitMQ versions 3.13.15, 4.0.20, 4.1.11, or 4.2.6 to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jul 13, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-287 | Improper Authentication | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| broadcom rabbitmq server | >= 3.13.0, < 4.2.6 |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 13, 2026 | Initial Analysis | [email protected] |
| Jul 13, 2026 | CVE Modified | CISA-ADP |
| Jul 10, 2026 | New CVE Received | [email protected] |