Information disclosure in RabbitMQ Server - CVE-2026-57219
Published: June 25, 2026 / Updated: June 25, 2026
Vulnerability identifier: #VU135147
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-57219
CWE-ID: CWE-200
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to exposure of sensitive information in the HTTP API endpoint GET /api/auth when handling unauthenticated requests on affected OAuth 2 configurations. A remote attacker can send a request to the endpoint to disclose sensitive information.
Only installations with the management plugin enabled and OAuth 2 configured to use the management.oauth_client_secret setting are vulnerable.
Affected software
RabbitMQ Server
Fedora
rabbitmq-server
Fedora
rabbitmq-server
How to mitigate CVE-2026-57219
Install security update from vendor's website.
RabbitMQ Server - addressed in versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, 4.3.0
rabbitmq-server - update to 4.0.9-5.fc43
rabbitmq-server - update to 4.0.9-5.fc43