# CVE-2026-57211

## Summary

- **CVE ID:** CVE-2026-57211
- **Severity:** MEDIUM
- **CVSS Score:** 6.5 (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:** Jul 10, 2026
- **Last Modified:** Jul 13, 2026

## Description

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.

## Affected Products

- rabbitmq — rabbitmq-server (>= 4.2.0, < 4.2.6)
- rabbitmq — rabbitmq-server (>= 4.1.0, < 4.1.11)

## References

- [CNA](https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-7v84-m3g5-vxq6)
- [CNA](https://github.com/rabbitmq/rabbitmq-server/pull/15803)
- [CNA](https://github.com/rabbitmq/rabbitmq-server/commit/39c3a8e9c71da0403d8dfc13f700e60c936e3682)
- [CNA](https://github.com/rabbitmq/rabbitmq-server/commit/6730797f6a34b4e8308cea60adf1243857e70204)
- [CNA](https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.63%
- **EPSS Percentile:** 48.0

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._