CVE-2026-57219: Broadcom Rabbitmq Server

High severity, CVSS 7.5. EPSS: 2.8% chance of exploitation in the next 30 days.

RabbitMQ is a messaging and streaming broker. Prior to 3.13.15, 4.0.20, 4.1.11, and 4.2.6, the obsolete GET /api/auth endpoint can disclose the OAuth 2 client secret on RabbitMQ installations configured with management.oauth_client_secret, exposing credentials to unauthenticated callers when the management plugin and that OAuth configuration are enabled. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, and 4.2.6.

Affected products

• Broadcom Rabbitmq Server: from 3.13.0, before 4.2.6 (fixed in 4.2.6)

Published 2026-07-10. Last modified 2026-07-29.