{"id":"CVE-2026-67236","title":"RabbitMQ is a messaging and streaming broker","summary":"RabbitMQ is a messaging and streaming broker. From 4.2.0 until 4.2.8 and 4.3.2, a successful POST /login caused is_authorized/2 to set an auth cookie containing base64-encoded username:password credentials without HttpOnly, Secure, SameS…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","cwe":["CWE-312"],"vendor":"broadcom","product":"rabbitmq_server","affected":["rabbitmq_server >= 4.2.0, < 4.2.8","rabbitmq_server >= 4.3.0, < 4.3.2"],"patched":["rabbitmq_server 4.3.2"],"published":"2026-09-25","updated":"2026-10-15","sourceUpdated":"2026-10-15T20:24:24.710","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-67236","references":[{"url":"https://github.com/rabbitmq/rabbitmq-server/commit/df9e7f4c0afd311a672705f020d301efad355745","label":"security-advisories@github.com"},{"url":"https://github.com/rabbitmq/rabbitmq-server/commit/edf1fbc7217aaf736955d2e13c9534901a2e0778","label":"security-advisories@github.com"},{"url":"https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.8","label":"security-advisories@github.com"},{"url":"https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.2","label":"security-advisories@github.com"},{"url":"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-88vh-gx85-p36m","label":"security-advisories@github.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-67236.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-67236"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2541491"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-67236"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-67236"},{"url":"https://access.redhat.com/errata/RHSA-2026:67552"}],"tags":["nvd","cve.org","csaf","vex","red-hat","score-dispute"],"epss":0.00166,"epssPercentile":0.05828,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-28T13:41:31.815135Z"},"scores":{"nvd":6.5,"cna":8.2,"vendor":5.3},"ingestedAt":"2026-09-25T16:12:08.723Z","slug":"CVE-2026-67236","body":"## Overview\n\nRabbitMQ is a messaging and streaming broker. From 4.2.0 until 4.2.8 and 4.3.2, a successful POST /login caused is_authorized/2 to set an auth cookie containing base64-encoded username:password credentials without HttpOnly, Secure, SameSite, or expiration protections. Because base64 is encoding rather than encryption, an attacker with same-origin cross-site scripting, an HTTP-readable network position, or local access to the browser cookie store could recover the actual login credentials; older browsers that treated an absent SameSite attribute as None also sent the cookie cross-site. This issue is fixed in versions 4.2.8 and 4.3.2.\n\n## Affected\n\n- `rabbitmq_server >= 4.2.0, < 4.2.8`\n- `rabbitmq_server >= 4.3.0, < 4.3.2`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `rabbitmq_server 4.3.2`\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 · no fix planned: Red Hat Hardened Images · updated 2026-09-29 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-67236.json)","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":230114,"id":"CVE-2026-67236","ts":1793124792444,"field":"cvss","old":"8.2","new":"6.5"},{"seq":230113,"id":"CVE-2026-67236","ts":1793124792444,"field":"severity","old":"high","new":"medium"}]}