{"schema":"threatline.record/2","record":{"id":"CVE-2026-67226","aliases":["GHSA-34c7-r8w9-5wv8"],"summary":"RabbitMQ: Admin-only atom exhaustion: PUT /api/users tags list","details":"RabbitMQ is a messaging and streaming broker. From 4.0.0 until 4.0.22 and 4.1.14 and 4.2.7, Admin-only atom exhaustion: PUT /api/users tags list. settags/2 maps rabbitdatacoercion:toatom/1 over the user's tags list. The 20 MB management body limit fits ~3-4M short tag strings. An administrator can crash the node in a single request by creating a user (or importing definitions) with ~1M unique tag administrator. This issue is fixed in versions 4.0.22 and 4.1.14 and 4.2.7.","categories":["Unclassified"],"product":"rabbitmq-server","vendor":"rabbitmq","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-67226","source_modified_at":"2026-09-25T19:55:13.807Z","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"}],"defaultStatus":null},{"source":"GitHub Advisory Database","source_url":"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-34c7-r8w9-5wv8","source_modified_at":"2026-07-29T15:04:02Z","fetched_at":"2026-10-23T18:58:35.272684Z","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-34c7-r8w9-5wv8","source_modified_at":"2026-07-29T15:04:02Z","fetched_at":"2026-10-23T18:58:35.272684Z","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-34c7-r8w9-5wv8","source_modified_at":"2026-07-29T15:04:02Z","fetched_at":"2026-10-23T18:58:35.272684Z","package":{"ecosystem":"other","name":"rabbitmq-server"},"range":">= 4.2.0, < 4.2.7"}],"fixed_versions":[{"source":"GitHub Advisory Database","source_url":"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-34c7-r8w9-5wv8","source_modified_at":"2026-07-29T15:04:02Z","fetched_at":"2026-10-23T18:58:35.272684Z","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-34c7-r8w9-5wv8","source_modified_at":"2026-07-29T15:04:02Z","fetched_at":"2026-10-23T18:58:35.272684Z","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-34c7-r8w9-5wv8","source_modified_at":"2026-07-29T15:04:02Z","fetched_at":"2026-10-23T18:58:35.272684Z","package":{"ecosystem":"other","name":"rabbitmq-server"},"version":"4.2.7"}],"cvss":6.9,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.00389,"percentile":0.31865,"score_date":"2026-10-23"},"published_at":"2026-09-25T16:29:13.662Z","modified_at":"2026-09-25T19:55:13.807Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-67226","fetched_at":"2026-10-23T18:52:38.922436Z","source_modified_at":"2026-09-25T19:55:13.807Z"},{"source":"GitHub Advisory Database","url":"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-34c7-r8w9-5wv8","fetched_at":"2026-10-23T18:58:35.272684Z","source_modified_at":"2026-07-29T15:04:02Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-67226","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-34c7-r8w9-5wv8","tags":["exploit"]},{"source":"CVE List","url":"https://github.com/rabbitmq/rabbitmq-server/commit/86601c5a6d1c7e41060e3dbd165c88bdc91266ee","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.7","tags":["x_refsource_MISC"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"poc","automatable":"no","technical_impact":"partial","assessed_at":"2026-09-25T19:55:06.667719Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-09-25T19:55:13.807Z","content_hash":"25d259b72cf3fbc9fdbeb3716c7e1705939b7cf2e8672094f6d0b7999d63ec97"}}