CVE-2026-66078
CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
Summary
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 Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| rabbitmq | rabbitmq-server | >= 3.13.0, < 3.13.15 | affected |
| rabbitmq | rabbitmq-server | >= 4.0.0, < 4.0.20 | affected |
| rabbitmq | rabbitmq-server | >= 4.1.0, < 4.1.11 | affected |
| rabbitmq | rabbitmq-server | >= 4.2.0, < 4.2.6 | affected |
Weaknesses
- CWE-862: CWE-862: Missing Authorization
References
- https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-j9m2-hw6x-rqr9
- https://github.com/rabbitmq/rabbitmq-server/commit/e5b890a64b42ec1f79a8e9d735512150cf77479c
- https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6
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