CVE-2026-57216
RabbitMQ: AMQP 1.0, AMQP 0-9-1, Stream Protocol loopback enforcement can lead to remote guest sessions due to listener-address loopback checks
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.
INFO
Published Date :
July 10, 2026, 9:16 p.m.
Last Modified :
July 13, 2026, 9:09 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | CRITICAL | [email protected] |
Solution
- Update RabbitMQ to version 3.13.15 or later.
- Update RabbitMQ to version 4.0.20 or later.
- Update RabbitMQ to version 4.1.11 or later.
- Update RabbitMQ to version 4.2.6 or later.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-57216.
| URL | Resource |
|---|---|
| https://github.com/rabbitmq/rabbitmq-server/commit/7273c9eb6920abcde17b892dbe97ccaf906ead47 | Patch |
| https://github.com/rabbitmq/rabbitmq-server/commit/9f8c39fcf0acbc43080ee7017a62a02832114112 | Patch |
| https://github.com/rabbitmq/rabbitmq-server/pull/15936 | Issue Tracking Patch |
| https://github.com/rabbitmq/rabbitmq-server/pull/15940 | Issue Tracking Patch |
| https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6 | Release Notes |
| https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-36m6-588r-vqcw | Exploit Vendor Advisory |
| https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-36m6-588r-vqcw | Exploit Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-57216 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-57216
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-57216 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-57216 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Jul. 13, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H Added CPE Configuration OR *cpe:2.3:a:broadcom:rabbitmq_server:*:*:*:*:*:*:*:* versions from (including) 3.13.0 up to (excluding) 4.2.6 Added Reference Type GitHub, Inc.: https://github.com/rabbitmq/rabbitmq-server/commit/7273c9eb6920abcde17b892dbe97ccaf906ead47 Types: Patch Added Reference Type GitHub, Inc.: https://github.com/rabbitmq/rabbitmq-server/commit/9f8c39fcf0acbc43080ee7017a62a02832114112 Types: Patch Added Reference Type GitHub, Inc.: https://github.com/rabbitmq/rabbitmq-server/pull/15936 Types: Issue Tracking, Patch Added Reference Type GitHub, Inc.: https://github.com/rabbitmq/rabbitmq-server/pull/15940 Types: Issue Tracking, Patch Added Reference Type GitHub, Inc.: https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6 Types: Release Notes Added Reference Type GitHub, Inc.: https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-36m6-588r-vqcw Types: Exploit, Vendor Advisory Added Reference Type CISA-ADP: https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-36m6-588r-vqcw Types: Exploit, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 13, 2026
Action Type Old Value New Value Added Reference https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-36m6-588r-vqcw Added SSVC {'id': 'CVE-2026-57216', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-07-13T14:00:50.887777Z'} -
New CVE Received by [email protected]
Jul. 10, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'rabbitmq', 'product': 'rabbitmq-server', 'versions': [{'status': 'affected', 'version': '>= 4.2.0, < 4.2.6'}, {'status': 'affected', 'version': '>= 4.1.0, < 4.1.11'}, {'status': 'affected', 'version': '>= 4.0.0, < 4.0.21'}, {'status': 'affected', 'version': '>= 3.13.0, < 3.13.15'}]}] Added 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. Added CVSS V3.1 AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N Added CWE CWE-287 Added Reference https://github.com/rabbitmq/rabbitmq-server/commit/7273c9eb6920abcde17b892dbe97ccaf906ead47 Added Reference https://github.com/rabbitmq/rabbitmq-server/commit/9f8c39fcf0acbc43080ee7017a62a02832114112 Added Reference https://github.com/rabbitmq/rabbitmq-server/pull/15936 Added Reference https://github.com/rabbitmq/rabbitmq-server/pull/15940 Added Reference https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6 Added Reference https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-36m6-588r-vqcw