Observable discrepancy in RabbitMQ Server - #VU150998
Published: September 18, 2026
Vulnerability identifier: #VU150998
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-203
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to disclose the existence of vhosts and Stream queues.
The vulnerability exists due to an observable response discrepancy in rabbit_stream_publishers_mgmt when handling Stream Publisher Management API requests for vhosts and queues. A remote user can send requests specifying vhost and Stream queue names to disclose the existence of vhosts and Stream queues.
Exploitation requires a management-tagged user with no permissions on the target vhost.
Affected software
RabbitMQ Server
Remediation
Install security update from vendor's website.
RabbitMQ Server - addressed in versions 4.2.11, 4.3.6