{"id":"CVE-2026-66072","revision":"78c87816dce3489c87c9cea806aba440","records":[{"revision":"78c87816dce3489c87c9cea806aba440","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-66072","aliases":[],"title":"RabbitMQ: Atom table exhaustion via stream `chunk_selector`","description":"RabbitMQ is a messaging and streaming broker. Prior to versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.1, get_chunk_selector/1 calls binary_to_atom on the raw client-supplied <<\"chunk_selector\">> property from post-auth subscribe and resolve_offset_spec frames, with no whitelist and no existing guard. An authenticated stream client with read access to any stream can crash the broker node. Preconditions include rabbitmq_stream plugin enabled Authenticated stream-protocol user with read access to at least one stream. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.1.","state":0,"publishedAt":"2026-09-23T20:13:13.215+00:00","modifiedAt":"2026-09-24T14:27:29.171+00:00","affected":[{"ecosystem":"Vendor product","name":"rabbitmq-server","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"rabbitmq\",\n                    \"product\": \"rabbitmq-server\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 3.13.0, < 3.13.15\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \">= 4.0.0, < 4.0.20\",\n                            \"status\": \"affected\"\n                        },\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                            \"version\": \">= 4.3.0, < 4.3.1\",\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:N/VI:N/VA:H/SC:N/SI:N/SA:N","score":6,"severity":"MEDIUM"}],"references":["https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-48hm-chgv-398r","https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6","https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.1"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-66072","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-66072","identifiers":["CVE-2026-66072"]},"retained":false,"historicalAffected":[]}],"coverage":[]}