CVE-2026-66067

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{"bugzilla": {"description": "rabbitmq: RabbitMQ: Authenticated user can bypass connection limits via stream protocol", "id": "2539766", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2539766"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-1220", "details": ["A flaw was found in RabbitMQ. The stream protocol handler does not correctly enforce per-user and per-virtual host (vhost) connection limits. An authenticated user can exploit this by connecting through port 5552, bypassing the intended connection restrictions. This could lead to resource exhaustion and a denial of service (DoS) for the RabbitMQ broker."], "name": "CVE-2026-66067", "package_state": [{"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Will not fix", "package_name": "rabbitmq-server4.2", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Affected", "package_name": "rabbitmq-server4.3", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-09-23T20:12:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-66067\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-66067\nhttps://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.7\nhttps://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.1\nhttps://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-hwqx-2gfg-89qf"], "threat_severity": "Moderate"}

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