{"schema":"threatline.record/2","record":{"id":"CVE-2026-67414","aliases":["GHSA-w6mq-4qpx-v7mh"],"summary":"RabbitMQ AMQP 1.0 parser: amplification memory-exhaustion DoS via zero-width array aggregation","details":"RabbitMQ is a messaging and streaming broker. From 4.0.0 until 4.0.24, 4.1.15, 4.2.10, and 4.3.4, deps/amqp10_common/src/amqp10_binary_parser.erl materializes each element of AMQP 1.0 arrays whose shared constructor has zero width, while limiting only the number of elements in each array and not the aggregate arrays in a frame. After completing SASL authentication, a low-privilege client can send an ordinary frame containing many individually permitted arrays, causing a small frame to expand into a very large reader-process heap before later frame validation or authorization. Because deps/rabbit/src/rabbit_amqp_reader.erl clears the pre-authentication max_heap_size guard after login, repeated or concurrent frames can trigger the node-wide memory alarm, block publishers, or exhaust broker memory. This issue is fixed in versions 4.0.24, 4.1.15, 4.2.10, and 4.3.4.","categories":["Unclassified"],"product":"rabbitmq-server","vendor":"rabbitmq","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-67414","source_modified_at":"2026-10-14T16:04:07.449Z","fetched_at":"2026-10-23T18:48:36.087640Z","product":"rabbitmq-server","vendor":"rabbitmq","versions":[{"version":">= 4.0.0, < 4.0.24","status":"affected"},{"version":">= 4.1.0, < 4.1.15","status":"affected"},{"version":">= 4.2.0, < 4.2.10","status":"affected"},{"version":">= 4.3.0, < 4.3.4","status":"affected"}],"defaultStatus":null}],"fixed_versions":[],"cvss":6,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.00543,"percentile":0.44839,"score_date":"2026-10-23"},"published_at":"2026-10-14T16:04:07.449Z","modified_at":"2026-10-14T16:04:07.449Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-67414","fetched_at":"2026-10-23T18:48:36.087640Z","source_modified_at":"2026-10-14T16:04:07.449Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-67414","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-w6mq-4qpx-v7mh","tags":["x_refsource_CONFIRM"]},{"source":"CVE List","url":"https://github.com/rabbitmq/rabbitmq-server/commit/3f0f67dfb7c4390e3cbfa25ab3ee19dcb0845bd4","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.4","tags":["x_refsource_MISC"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-14T16:04:07.449Z","content_hash":"72fd09c9f7e08d0c2b605d33e6796ff7debcece897a05ca13e5024f483accab7"}}