CVE-2026-66078
RabbitMQ is a messaging and streaming broker.
Impact
RabbitMQ is a messaging and streaming broker. From 3.13.0 until 3.13.15 and 4.0.20 and 4.1.11 and 4.2.6, protected tag bypass via bulk-delete. dELETE /api/users/:name refuses to delete users tagged protected (rabbitmgmtwmuser:deleteresource/2 checks isprotecteduser). POST /api/users/bulk-delete iterates the supplied username list and calls rabbitauthbackendinternal:deleteuser/2 directly , that function has no protected-tag check , so the guard is silently An administrator can delete protected-tagged service accounts via the bulk endpoint, bypassing a safeguard the test suite confirms is rabbitmqmanagement enabled Attacker has the administrator tag A protected-tagged user. This issue is fixed in versions 3.13.15 and 4.0.20 and 4.1.11 and 4.2.6.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Broadcom | Rabbitmq Server | from 3.13.0 before 3.13.15 from 4.0.0 before 4.0.20 from 4.1.0 before 4.1.11 from 4.2.0 before 4.2.6 |