CVE-2026-66075

RabbitMQ: Monitoring-tag user can restart federation links

State: Published
Severity: 2.3 Low
Published: Sep 23, 2026
Updated: Sep 24, 2026
Reserved: Jul 23, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
4.0	2.3 Low	CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N	GitHub_M

Weaknesses

CWE-862 Missing Authorization

Affected Products

Product	Versions
rabbitmq-serverrabbitmq	>= 3.13.0, < 3.13.15Affected >= 4.0.0, < 4.0.20Affected >= 4.1.0, < 4.1.11Affected >= 4.2.0, < 4.2.6Affected >= 4.3.0, < 4.3.1Affected

References

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