{"id":"CVE-2026-66080","revision":"c7cffb17513d4823920087ebcf2a3b24","records":[{"revision":"c7cffb17513d4823920087ebcf2a3b24","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-66080","aliases":[],"title":"RabbitMQ: Super-stream partitions unbounded allocation","description":"RabbitMQ is a messaging and streaming broker. Prior to versions 4.1.11, 4.2.6, and 4.3.0, validate_partitions only checks that the requested partition count is at least 1, with no upper bound. A large count such as lists:seq(0, 500000000) allocates roughly 8GB. Preconditions include The rabbitmq_stream_management plugin must be enabled. The caller needs the management tag and access to the target vhost.. This issue is fixed in versions 4.1.11, 4.2.6, and 4.3.0.","state":0,"publishedAt":"2026-09-23T20:20:34.845+00:00","modifiedAt":"2026-09-24T15:05:05.967+00:00","affected":[{"ecosystem":"Vendor product","name":"rabbitmq-server","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"rabbitmq\",\n                    \"product\": \"rabbitmq-server\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 4.1.0, < 4.1.11\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \">= 4.2.0, < 4.2.6\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","score":5.9,"severity":"MEDIUM"}],"references":["https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-wg79-5449-m728","https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6","https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.0"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-66080","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-66080","identifiers":["CVE-2026-66080"]},"retained":false,"historicalAffected":[]}],"coverage":[]}