PT-2026-57301 · Rabbitmq · Rabbitmq-Server

Published 2026-07-10 · Updated 2026-07-10 · CVE-2026-57216

Mitre

CVSS v3.1

6.8

Medium

Base vector

AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N

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.

Fix

Improper Authentication

Weakness Enumeration

CWE-287

Related Identifiers

CVE-2026-57216

Affected Products

Rabbitmq-Server

References · 7

• https://nvd.nist.gov/vuln/detail/CVE-2026-57216 · Security Note
• https://github.com/rabbitmq/rabbitmq-server/commit/7273c9eb6920abcde17b892dbe97ccaf906ead47 · Note
• https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-36m6-588r-vqcw · Note
• https://github.com/rabbitmq/rabbitmq-server/commit/9f8c39fcf0acbc43080ee7017a62a02832114112 · Note
• https://github.com/rabbitmq/rabbitmq-server/pull/15936 · Note
• https://github.com/rabbitmq/rabbitmq-server/pull/15940 · Note
• https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6 · Note