CVE-2026-57211
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.63%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 10.0 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- EPSS
- 0.63% probability · 48th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-36, CWE-918
- Affected
- broadcom/rabbitmq server
- Source
- security-advisories@github.com
References
- https://github.com/rabbitmq/rabbitmq-server/commit/39c3a8e9c71da0403d8dfc13f700e60c936e3682Patch
- https://github.com/rabbitmq/rabbitmq-server/commit/6730797f6a34b4e8308cea60adf1243857e70204Patch
- https://github.com/rabbitmq/rabbitmq-server/pull/15803Issue Tracking, Patch
- https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6Release Notes
- https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-7v84-m3g5-vxq6Exploit, Vendor Advisory
- https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-7v84-m3g5-vxq6Exploit, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.