{"id":"CVE-2026-67421","title":"RabbitMQ is a messaging and streaming broker","summary":"RabbitMQ is a messaging and streaming broker. From 3.13.0 until 3.13.19, 4.0.24, 4.1.15, 4.2.10, and 4.3.5, RabbitMQ Management rendered an AMQP authorization-error reason containing an attacker-controlled queue name as HTML when the OAu…","severity":"medium","cvss":4.5,"cvssVector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:L/VI:L/VA:N/SC:H/SI:L/SA:N","cwe":["CWE-862"],"vendor":"rabbitmq","product":"rabbitmq-server","affected":["rabbitmq-server >= 3.13.0, < 3.13.19","rabbitmq-server >= 4.0.0, < 4.0.24","rabbitmq-server >= 4.1.0, < 4.1.15","rabbitmq-server >= 4.2.0, < 4.2.10","rabbitmq-server >= 4.3.0, < 4.3.5"],"published":"2026-09-25","updated":"2026-09-25","sourceUpdated":"2026-09-25T20:17:39.547","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-67421","references":[{"url":"https://github.com/rabbitmq/rabbitmq-server/commit/ff595eaaa6d4f580f72fa04801ffd35f48c46027","label":"security-advisories@github.com"},{"url":"https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.5","label":"security-advisories@github.com"},{"url":"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-6256-27fm-4rgr","label":"security-advisories@github.com"},{"url":"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-6256-27fm-4rgr","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-25T19:57:04.069632Z"},"cvssSource":"cna","ingestedAt":"2026-09-25T17:13:14.019Z","slug":"CVE-2026-67421","body":"## Overview\n\nRabbitMQ is a messaging and streaming broker. From 3.13.0 until 3.13.19, 4.0.24, 4.1.15, 4.2.10, and 4.3.5, RabbitMQ Management rendered an AMQP authorization-error reason containing an attacker-controlled queue name as HTML when the OAuth management UI was enabled. Exploitation requires an attacker with queue configure permission, a management administrator who can see but cannot read that queue, and the administrator clicking Get Message(s). A queue name containing a base element can then retarget the automatic relative refresh because the Content Security Policy omits base-uri and connect-src, and an attacker endpoint that permits the management origin through CORS can receive the victim's Authorization header. This issue is fixed in versions 3.13.19, 4.0.24, 4.1.15, 4.2.10, and 4.3.5.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":37,"depthScoreParts":{"impact":24.8,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[{"seq":211163,"id":"CVE-2026-67421","ts":1790367519825,"field":"exploit_available","old":"false","new":"true"}]}