{"id":"CVE-2026-67227","published":"2026-09-25T17:17:11.417","lastModified":"2026-09-28T14:38:38.163","description":"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.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":["CWE-400"],"vendors":[],"products":[],"references":[{"url":"https://github.com/rabbitmq/rabbitmq-server/commit/8fbe6d8112427e85fb9a9206b3eb6e9a3ddd3e39","tags":[]},{"url":"https://github.com/rabbitmq/rabbitmq-server/commit/fc591e7ee27a29657ca960930acefd3e4217e007","tags":[]},{"url":"https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.7","tags":[]},{"url":"https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.1","tags":[]},{"url":"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-q7x8-97rh-cr24","tags":[]}],"exploitRefs":[{"url":"https://github.com/rabbitmq/rabbitmq-server/commit/8fbe6d8112427e85fb9a9206b3eb6e9a3ddd3e39","tags":[]},{"url":"https://github.com/rabbitmq/rabbitmq-server/commit/fc591e7ee27a29657ca960930acefd3e4217e007","tags":[]},{"url":"https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.7","tags":[]},{"url":"https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.1","tags":[]},{"url":"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-q7x8-97rh-cr24","tags":[]}],"hasPoc":true,"ai":null}