CVE-2026-57211
rabbitmq: RabbitMQ: Information disclosure via path validation bypass in management plugin
Severity by source
Trivy's own label is CRITICAL. Rated critical by NVD, Red Hat, Photon OS. Rated lower by Azure Linux (medium).
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 packages and fixed versions
| Source | Package | Fixed in |
|---|---|---|
| Photon OS 5.0 | rabbitmq-server | 4.2.9-1.ph5 |
| Azure Linux 3.0 | rabbitmq-server | 0:3.13.7-7.azl3 |
References
- https://access.redhat.com/security/cve/CVE-2026-57211
- https://github.com/rabbitmq/rabbitmq-server/commit/39c3a8e9c71da0403d8dfc13f700e60c936e3682
- https://github.com/rabbitmq/rabbitmq-server/commit/6730797f6a34b4e8308cea60adf1243857e70204
- https://github.com/rabbitmq/rabbitmq-server/pull/15803
- https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6
- https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-7v84-m3g5-vxq6
- https://nvd.nist.gov/vuln/detail/CVE-2026-57211
- https://www.cve.org/CVERecord?id=CVE-2026-57211