---
id: CVE-2026-57211
title: RabbitMQ is a messaging and streaming broker
summary: >-
  RabbitMQ is a messaging and streaming broker. Prior to 4.1.11 and 4.2.6 on
  Windows, the RabbitMQ management plugin static file handler
  rabbit_mgmt_wm_static can pass URL-encoded backslashes to
  erl_prim_loader:read_file_info before path v…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N'
cwe:
  - CWE-36
  - CWE-918
published: '2026-07-10'
updated: '2026-07-10'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-57211'
references:
  - url: >-
      https://github.com/rabbitmq/rabbitmq-server/commit/39c3a8e9c71da0403d8dfc13f700e60c936e3682
    label: security-advisories@github.com
  - url: >-
      https://github.com/rabbitmq/rabbitmq-server/commit/6730797f6a34b4e8308cea60adf1243857e70204
    label: security-advisories@github.com
  - url: 'https://github.com/rabbitmq/rabbitmq-server/pull/15803'
    label: security-advisories@github.com
  - url: 'https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6'
    label: security-advisories@github.com
  - url: >-
      https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-7v84-m3g5-vxq6
    label: security-advisories@github.com
tags:
  - nvd
epss: 0.00631
epssPercentile: 0.48876
ingestedAt: '2026-07-11T20:15:27.013Z'
---

## Overview

RabbitMQ is a messaging and streaming broker. Prior to 4.1.11 and 4.2.6 on Windows, the RabbitMQ management plugin static file handler rabbit_mgmt_wm_static can pass URL-encoded backslashes to erl_prim_loader:read_file_info before path validation when multiple management extension plugins are enabled, causing outbound DNS and SMB requests to attacker-controlled UNC paths. This issue is fixed in versions 4.1.11 and 4.2.6.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.