{"schema_version":"1","data":[{"id":3962,"advisory_id":"7a3bbf89-e7af-438b-a91a-fc448ee53306","revision":1,"source_id":"core-cve","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-66078","source_published_at":"2026-09-25T16:09:46.197+00:00","published_at":"2026-10-24T21:44:22.783594+00:00","extraction_method":"structured","technologies":["core-cve","rabbitmq-server"],"cve_ids":["CVE-2026-66078"],"event_types":["advisory"],"payload":{"kind":"advisory","title":"RabbitMQ: protected tag bypass via bulk-delete","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.","evidence":"cve:CVE-2026-66078","products":[{"name":{"value":"rabbitmq-server","evidence":"/containers/cna/affected/0/product"},"prerequisites":[],"fixed_versions":[],"affected_versions":[]}],"severity":"low","structured":{"id":"CVE-2026-66078","aliases":["CVE-2026-66078"],"metrics":[{"cvssV4_0":{"version":"4.0","baseScore":2.1,"attackVector":"NETWORK","baseSeverity":"LOW","vectorString":"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","userInteraction":"NONE","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"HIGH","subIntegrityImpact":"NONE","vulnIntegrityImpact":"LOW","subAvailabilityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","vulnConfidentialityImpact":"NONE"}}],"affected":[{"vendor":"rabbitmq","product":"rabbitmq-server","versions":[{"status":"affected","version":">= 3.13.0, < 3.13.15"},{"status":"affected","version":">= 4.0.0, < 4.0.20"},{"status":"affected","version":">= 4.1.0, < 4.1.11"},{"status":"affected","version":">= 4.2.0, < 4.2.6"}]}],"modified":"2026-09-29T19:24:14.403Z","provider":"cve","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"],"provider_metadata":{"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-66078","role":"CISA Coordinator","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2026-09-29T19:23:41.607515Z"}}}],"references":[{"url":"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-j9m2-hw6x-rqr9","tags":["exploit"]}],"providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-09-29T19:24:14.403Z"}}],"cna":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-09-25T16:09:46.197Z"}}},"related_cves":[{"value":"CVE-2026-66078","evidence":"/cveMetadata/cveId"}],"security_relevant":true,"severity_evidence":"/containers/cna/metrics"}}],"next_after":3962,"next_before":3962}