CVE-2026-66069: Rabbitmq Rabbitmq-Server

Low severity, CVSS 2.3. EPSS: 0.4% chance of exploitation in the next 30 days.

RabbitMQ is a messaging and streaming broker. Prior to versions 4.1.13, 4.2.7, and 4.3.0, is_authorized/2 uses is_authorized_monitor for all methods. DELETE resets rabbit_core_metrics:reset_auth_attempt_metrics(). Impact is cosmetic (counters only, no log erasure), but inconsistent with rabbit_mgmt_wm_reset.erl which requires admin for the analogous operation. A monitoring-tagged user can reset the per-node authentication-attempt counters via DELETE /api/auth/attempts/:node, erasing evidence of brute-force activity. The sibling endpoint wm_reset requires administrator. Preconditions include Management plugin enabled monitoring tag. This issue is fixed in versions 4.1.13, 4.2.7, and 4.3.0.

Affected products

• Rabbitmq Rabbitmq-Server: from 4.1.0, before 4.1.13 (fixed in 4.1.13); from 4.2.0, before 4.2.7 (fixed in 4.2.7)

Published 2026-09-23. Last modified 2026-09-24.