CVE-2026-57216

CRITICAL

INFO Priority: 0.05 BB Relevance: 80/100

Published: 2026-07-10 Modified: 2026-10-25 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction Conf. Impact Integ. Impact Scope Change

CVSS Vector Breakdown

AV: Network

AC: Low

PR: None

UI: None

S: Changed

C: High

I: High

A: High

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.

Weakness Classification (1)

CWE-287

Affected Software (4)

Vendor	Product	Version
broadcom	rabbitmq_server	3.13.0 – 3.13.15
broadcom	rabbitmq_server	4.0.0 – 4.0.20
broadcom	rabbitmq_server	4.1.0 – 4.1.11
broadcom	rabbitmq_server	4.2.0 – 4.2.6