{"id":"CVE-2026-67239","title":"RabbitMQ is a messaging and streaming broker","summary":"RabbitMQ is a messaging and streaming broker. From 3.13.0 until 3.13.18 and 4.0.23 and 4.1.14 and 4.2.9 and 4.3.3, Stored XSS via TLS peer-certificate DN in stream-management UI (sibling of V-11). lines 102/106/110 render peercertsubject…","severity":"medium","cvss":5.4,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","cwe":["CWE-79"],"vendor":"broadcom","product":"rabbitmq_server","affected":["rabbitmq_server >= 3.13.0, < 3.13.18","rabbitmq_server >= 4.0.0, < 4.0.23","rabbitmq_server >= 4.1.0, < 4.1.14","rabbitmq_server >= 4.2.0, < 4.2.9","rabbitmq_server >= 4.3.0, < 4.3.3"],"patched":["rabbitmq_server 4.3.3"],"published":"2026-09-25","updated":"2026-10-16","sourceUpdated":"2026-10-16T16:32:42.213","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-67239","references":[{"url":"https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.9","label":"security-advisories@github.com"},{"url":"https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.3","label":"security-advisories@github.com"},{"url":"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-xm9p-57xv-vxwc","label":"security-advisories@github.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-67239.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-67239"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2541513"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-67239"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-67239"},{"url":"https://access.redhat.com/errata/RHSA-2026:67552"}],"tags":["nvd","cve.org","csaf","vex","red-hat","score-dispute"],"epss":0.00154,"epssPercentile":0.04499,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-09-25T16:44:00.484727Z"},"scores":{"nvd":5.4,"cna":7.6,"vendor":4.7},"ingestedAt":"2026-09-25T17:13:14.016Z","slug":"CVE-2026-67239","body":"## Overview\n\nRabbitMQ is a messaging and streaming broker. From 3.13.0 until 3.13.18 and 4.0.23 and 4.1.14 and 4.2.9 and 4.3.3, Stored XSS via TLS peer-certificate DN in stream-management UI (sibling of V-11). lines 102/106/110 render peercertsubject / peercertissuer with raw <%= %> and no fmtstring(). RFC4514 backslash-escaping of </> is HTML-inert and bypassable (<img ... //>). Requires non-default config: a stream TLS listener with verifypeer and an attacker-obtainable trusted cert with a malicious Same as the connection.ejs finding, against operators viewing the stream-connection detail rabbitmqstream + rabbitmqstreammanagement enabled with a TLS listener using verifypeer Attacker can obtain a certificate signed by a CA the listener trusts, with attacker-chosen DN An operator views the. This issue is fixed in versions 3.13.18 and 4.0.23 and 4.1.14 and 4.2.9 and 4.3.3.\n\n## Affected\n\n- `rabbitmq_server >= 3.13.0, < 3.13.18`\n- `rabbitmq_server >= 4.0.0, < 4.0.23`\n- `rabbitmq_server >= 4.1.0, < 4.1.14`\n- `rabbitmq_server >= 4.2.0, < 4.2.9`\n- `rabbitmq_server >= 4.3.0, < 4.3.3`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `rabbitmq_server 4.3.3`\n\n## Vendor advisories\n\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)\n- **Red Hat VEX** · Moderate · affected: Red Hat Hardened Images, Red Hat OpenStack Platform 13 (Queens), Red Hat OpenStack Platform 16.2, Red Hat OpenStack Platform 17.1, Red Hat OpenStack Platform 18.0 · no fix planned: Red Hat OpenStack Platform 13 (Queens), Red Hat OpenStack Platform 16.2, Red Hat OpenStack Platform 17.1, Red Hat Hardened Images, … · updated 2026-10-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-67239.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":29.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":230351,"id":"CVE-2026-67239","ts":1793130919940,"field":"cvss","old":"7.6","new":"5.4"},{"seq":230350,"id":"CVE-2026-67239","ts":1793130919940,"field":"severity","old":"high","new":"medium"}]}