{"id":"CVE-2026-67412","revision":"444f4b50dd0d455dade9e20eed61a7fe","records":[{"revision":"444f4b50dd0d455dade9e20eed61a7fe","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-67412","aliases":[],"title":"RabbitMQ: Federation upstream skips vhost authorization allowing cross-vhost message access","description":"RabbitMQ is a messaging and streaming broker. From 3.13.0 until 4.3.3, 4.2.9 , 4.1.14, 4.0.24, and 3.13.18, Federation upstream in RabbitMQ skips vhost authorization allowing cross-vhost message access. what the bug lets you do. A policymaker on one vhost reads and drains messages out of another vhost it has no permission on. With the default ack-mode the source messages are consumed (deleted), not copied. Why that should not 1. Federation validates the upstream URI without any vhost-access Cross-vhost message read/drain from a per-vhost policymaker, breaking vhost tenancy This issue is fixed in versions 4.3.3, 4.2.9 , 4.1.14, 4.0.24, and 3.13.18.","state":0,"publishedAt":"2026-09-25T16:20:13.605+00:00","modifiedAt":"2026-09-25T16:45:00.348+00:00","affected":[{"ecosystem":"Vendor product","name":"rabbitmq-server","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"rabbitmq\",\n                    \"product\": \"rabbitmq-server\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 4.3.0, < 4.3.3\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \">= 4.2.0, < 4.2.9\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \">= 4.1.0, < 4.1.14\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \">= 4.0.0, < 4.0.24\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \">= 3.13.0, < 3.13.18\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N","score":6,"severity":"MEDIUM"}],"references":["https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-42pc-678q-v8qj","https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.9","https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.3"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-67412","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-67412","identifiers":["CVE-2026-67412"]},"retained":false,"historicalAffected":[]}],"coverage":[]}