Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Broadcom | Rabbitmq Server | >= 4.1.0, < 4.2.6 |
| Microsoft | Windows | - |
Related Weaknesses (CWE)
References
- https://github.com/rabbitmq/rabbitmq-server/commit/39c3a8e9c71da0403d8dfc13f700ePatch
- https://github.com/rabbitmq/rabbitmq-server/commit/6730797f6a34b4e8308cea60adf12Patch
- https://github.com/rabbitmq/rabbitmq-server/pull/15803Issue TrackingPatch
- https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6Release Notes
- https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-7v84-m3g5-vExploitVendor Advisory
- https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-7v84-m3g5-vExploitVendor Advisory
FAQ
What is CVE-2026-57211?
CVE-2026-57211 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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_pri...
How severe is CVE-2026-57211?
CVE-2026-57211 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-57211?
Check the references section above for vendor advisories and patch information. Affected products include: Broadcom Rabbitmq Server, Microsoft Windows.