CVE-2026-66076
published 2026-09-23CVE-2026-66076: RabbitMQ is a messaging and streaming broker. Prior to versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.0, is_authorized/2 calls…
PriorityP341medium6.5CVSS 3.1
AVNACLPRLUINSUCHINAN
EPSS
0.26%
16.5th percentile
RabbitMQ is a messaging and streaming broker. Prior to versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.0, is_authorized/2 calls rabbit_mgmt_util:is_authorized/2, which checks only the management tag, instead of is_authorized_vhost/2. The /api/queues/quorum/:vhost/:queue/status handler reads the vhost from the path without checking that the user can access it. Any management-tagged user can therefore read Raft status, including leader, members, term, and commit index, for quorum queues in inaccessible vhosts, exposing cross-tenant queue names and cluster topology. The management plugin must be enabled and the attacker must have a management tag. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.0.
Affected
8 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| broadcom | rabbitmq_server | >= 3.13.0 < 3.13.15 | 3.13.15 |
| broadcom | rabbitmq_server | >= 4.0.0 < 4.0.20 | 4.0.20 |
| broadcom | rabbitmq_server | >= 4.1.0 < 4.1.11 | 4.1.11 |
| broadcom | rabbitmq_server | >= 4.2.0 < 4.2.6 | 4.2.6 |
| rabbitmq | rabbitmq-server | — | — |
| rabbitmq | rabbitmq-server | — | — |
| rabbitmq | rabbitmq-server | — | — |
| rabbitmq | rabbitmq-server | — | — |
CVSS provenance
nvdv3.16.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
nvdv4.02.3LOWCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vendor_redhat2.3LOW
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VulDB
RabbitMQ up to 4.3.x Management Plugin status is_authorized vhost information disclosure
vuldb·2026-09-23·CVSS 2.3
CVE-2026-66076 [LOW] RabbitMQ up to 4.3.x Management Plugin status is_authorized vhost information disclosure
A vulnerability was found in RabbitMQ up to 3.13.14/4.0.19/4.1.10/4.2.5/4.3.x and classified as problematic. Affected is the function is_authorized of the file /api/queues/quorum/:vhost/:queue/status of the component Management Plugin. Executing a manipulation of the argument vhost can lead to information disclosure.
This vulnerability is registered as CVE-2026-66076. It is possible to launch the attack remotely. No exploit is available.
It is suggested to upgrade the affected component.
Red Hat
rabbitmq: RabbitMQ: Information disclosure via cross-vhost authorization bypass
vendor_redhat·2026-09-23·CVSS 2.3
CVE-2026-66076 [LOW] CWE-639 rabbitmq: RabbitMQ: Information disclosure via cross-vhost authorization bypass
rabbitmq: RabbitMQ: Information disclosure via cross-vhost authorization bypass
A flaw was found in RabbitMQ. An authorization bypass vulnerability allows a management-tagged user to read Raft status, including leader, members, term, and commit index, for quorum queues in inaccessible virtual hosts (vhosts). This exposes sensitive cross-tenant queue names and cluster topology information. This issue occurs when the management plugin is enabled.
Package: rabbitmq-server4.2 (Red Hat Hardened Images) - Will not fix
Package: rabbitmq-server4.3 (Red Hat Hardened Images) - Affected
No detection rules found.
No public exploits indexed.
2026-09-23
Published