CVE-2026-66075
mediumRabbitMQ is a messaging and streaming broker.
Vendor / product: Broadcom — rabbitmq server
RabbitMQ is a messaging and streaming broker. Prior to versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.1, is_authorized/2 for the /federation-links/.../restart route uses is_authorized_monitor (accepts the monitoring tag), while allowed_methods permits DELETE and delete_resource/2 triggers rabbit_federation_link_sup:restart. There is no per-method elevation check and no comment marking it intentional. A read-only monitoring user can restart any federation link , a state-changing operation that disrupts message flow. Preconditions include rabbitmq_federation + rabbitmq_federation_management plugins enabled Attacker has credentials with the monitoring tag. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.1.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L Affected products
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
References
- https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6 security-advisories@github.com
- https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.1 security-advisories@github.com
- https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-g5v3-w5xg-62q2 security-advisories@github.com