{"id":"CVE-2026-66076","title":"RabbitMQ is a messaging and streaming broker","summary":"RabbitMQ is a messaging and streaming broker. Prior to versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.0, is_authorized/2 calls rabbit_mgmt_util:is_authorized/2, which checks only the management tag, instead of is_authorized_vhost/2. Th…","severity":"low","cvss":2.3,"cvssVector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","cwe":["CWE-862","CWE-639"],"vendor":"rabbitmq","product":"rabbitmq-server","affected":["rabbitmq-server >= 3.13.0, < 3.13.15","rabbitmq-server >= 4.0.0, < 4.0.20","rabbitmq-server >= 4.1.0, < 4.1.11","rabbitmq-server >= 4.2.0, < 4.2.6"],"published":"2026-09-23","updated":"2026-09-24","sourceUpdated":"2026-09-24T15:17:28.493","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-66076","references":[{"url":"https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6","label":"security-advisories@github.com"},{"url":"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-j45q-v7g2-82ph","label":"security-advisories@github.com"},{"url":"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-j45q-v7g2-82ph","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-66076.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-66076"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2539721"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-66076"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-66076"},{"url":"https://access.redhat.com/errata/RHSA-2026:67552"}],"tags":["nvd","cve.org","exploit-available","csaf","vex","red-hat","score-dispute"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-24T14:31:07.323976Z"},"cvssSource":"cna","scores":{"cna":2.3,"vendor":4.3},"ingestedAt":"2026-09-23T20:32:10.748Z","patched":["hardened_images"],"epss":0.0033,"epssPercentile":0.26032,"slug":"CVE-2026-66076","body":"## Overview\n\nRabbitMQ is a messaging and streaming broker. Prior to versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.0, is_authorized/2 calls rabbit_mgmt_util:is_authorized/2, which checks only the management tag, instead of is_authorized_vhost/2. The /api/queues/quorum/:vhost/:queue/status handler reads the vhost from the path without checking that the user can access it. Any management-tagged user can therefore read Raft status, including leader, members, term, and commit index, for quorum queues in inaccessible vhosts, exposing cross-tenant queue names and cluster topology. The management plugin must be enabled and the attacker must have a management tag. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.0.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Hardened Images · no fix planned: Red Hat Hardened Images · updated 2026-09-25 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-66076.json)\n- **RHSA-2026:67552** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-09-15 · [advisory](https://access.redhat.com/errata/RHSA-2026:67552)","depth":"twilight","depthScore":25,"depthScoreParts":{"impact":12.6,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":210199,"id":"CVE-2026-66076","ts":1790264796915,"field":"exploit_available","old":"false","new":"true"}]}