{"schema":"threatline.record/2","record":{"id":"CVE-2026-67227","aliases":["GHSA-q7x8-97rh-cr24"],"summary":"RabbitMQ: Atom exhaustion: to_atom on global-parameter :name","details":"RabbitMQ is a messaging and streaming broker. From 4.0.0 until 4.0.22 and 4.1.14 and 4.2.7 and 4.3.1, Atom exhaustion: toatom on global-parameter :name. resourceexists/2 (and the PUT/DELETE handlers) call rabbitdatacoercion:toatom/1 on the :name URL path segment. toatom/1 uses binarytoatom/2 (unsafe). The endpoint requires policymaker (not management, but below A user with the policymaker tag can crash the node by exhausting the atom table via repeated requests to /api/global-parameters/:name with unique :name Management plugin enabled policymaker tag ~1M HTTP. This issue is fixed in versions 4.0.22 and 4.1.14 and 4.2.7 and 4.3.1.","categories":["Unclassified"],"product":"rabbitmq-server","vendor":"rabbitmq","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-67227","source_modified_at":"2026-09-25T17:48:04.204Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"rabbitmq-server","vendor":"rabbitmq","versions":[{"status":"affected","version":">= 4.0.0, < 4.0.22"},{"status":"affected","version":">= 4.1.0, < 4.1.14"},{"status":"affected","version":">= 4.2.0, < 4.2.7"},{"status":"affected","version":">= 4.3.0, < 4.3.1"}],"defaultStatus":null},{"source":"GitHub Advisory Database","source_url":"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-q7x8-97rh-cr24","source_modified_at":"2026-07-29T15:04:23Z","fetched_at":"2026-10-24T05:41:33.294140Z","package":{"ecosystem":"other","name":"rabbitmq-server"},"range":">= 4.0.0, < 4.0.22"},{"source":"GitHub Advisory Database","source_url":"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-q7x8-97rh-cr24","source_modified_at":"2026-07-29T15:04:23Z","fetched_at":"2026-10-24T05:41:33.294140Z","package":{"ecosystem":"other","name":"rabbitmq-server"},"range":">= 4.1.0, < 4.1.14"},{"source":"GitHub Advisory Database","source_url":"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-q7x8-97rh-cr24","source_modified_at":"2026-07-29T15:04:23Z","fetched_at":"2026-10-24T05:41:33.294140Z","package":{"ecosystem":"other","name":"rabbitmq-server"},"range":">= 4.2.0, < 4.2.7"},{"source":"GitHub Advisory Database","source_url":"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-q7x8-97rh-cr24","source_modified_at":"2026-07-29T15:04:23Z","fetched_at":"2026-10-24T05:41:33.294140Z","package":{"ecosystem":"other","name":"rabbitmq-server"},"range":">= 4.3.0, < 4.3.1"}],"fixed_versions":[{"source":"GitHub Advisory Database","source_url":"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-q7x8-97rh-cr24","source_modified_at":"2026-07-29T15:04:23Z","fetched_at":"2026-10-24T05:41:33.294140Z","package":{"ecosystem":"other","name":"rabbitmq-server"},"version":"4.0.22"},{"source":"GitHub Advisory Database","source_url":"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-q7x8-97rh-cr24","source_modified_at":"2026-07-29T15:04:23Z","fetched_at":"2026-10-24T05:41:33.294140Z","package":{"ecosystem":"other","name":"rabbitmq-server"},"version":"4.1.14"},{"source":"GitHub Advisory Database","source_url":"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-q7x8-97rh-cr24","source_modified_at":"2026-07-29T15:04:23Z","fetched_at":"2026-10-24T05:41:33.294140Z","package":{"ecosystem":"other","name":"rabbitmq-server"},"version":"4.2.7"},{"source":"GitHub Advisory Database","source_url":"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-q7x8-97rh-cr24","source_modified_at":"2026-07-29T15:04:23Z","fetched_at":"2026-10-24T05:41:33.294140Z","package":{"ecosystem":"other","name":"rabbitmq-server"},"version":"4.3.1"}],"cvss":5.9,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.00378,"percentile":0.30569,"score_date":"2026-10-23"},"published_at":"2026-09-25T16:31:45.840Z","modified_at":"2026-09-25T17:48:04.204Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-67227","fetched_at":"2026-10-23T18:52:38.922436Z","source_modified_at":"2026-09-25T17:48:04.204Z"},{"source":"GitHub Advisory Database","url":"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-q7x8-97rh-cr24","fetched_at":"2026-10-24T05:41:33.294140Z","source_modified_at":"2026-07-29T15:04:23Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-67227","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","GitHub Advisory Database","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-q7x8-97rh-cr24","tags":["x_refsource_CONFIRM"]},{"source":"CVE List","url":"https://github.com/rabbitmq/rabbitmq-server/commit/8fbe6d8112427e85fb9a9206b3eb6e9a3ddd3e39","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/rabbitmq/rabbitmq-server/commit/fc591e7ee27a29657ca960930acefd3e4217e007","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.7","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.1","tags":["x_refsource_MISC"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"partial","assessed_at":"2026-09-25T17:47:50.875187Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-09-25T17:48:04.204Z","content_hash":"5cad24bfa82040747f6382fad8706325ad9f968c02cb1b795025b8d12c6cf561"}}