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{"bugzilla": {"description": "mysql: mysql: unauthorized read access via connection handling", "id": "2557921", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2557921"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.3", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N", "status": "draft"}, "cwe": "CWE-488", "details": ["Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Server: Connection Handling). Supported versions that are affected are MySQL Server: 9.7.0-9.7.3, 26.7.0-26.7.1; MySQL Cluster: 9.7.0-9.7.3 and 26.7.0-26.7.1. Easily exploitable vulnerability allows low privileged attacker with network access via multiple protocols to compromise MySQL Server, MySQL Cluster. Successful attacks of this vulnerability can result in unauthorized read access to a subset of MySQL Server, MySQL Cluster accessible data. CVSS 3.1 Base Score 4.3 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N).", "A flaw was found in the MySQL connection handling component. A remote attacker with low privileges and network access can exploit this vulnerability using multiple protocols. Successful exploitation results in unauthorized read access to a subset of database data, leading to information disclosure."], "mitigation": {"lang": "en:us", "value": "Limit network access to the database service to authorized hosts only, or bind the daemon to localhost when external access is not necessary.\nTo restrict connections using firewalld to a trusted source network:\n# firewall-cmd --permanent --zone=trusted --add-source=192.168.1.0/24\n# firewall-cmd --permanent --remove-service=mysql\n# firewall-cmd --reload\nAlternatively, to restrict the daemon to local connections only, specify the loopback address in the database configuration file (for example, `/etc/my.cnf` under the `[mysqld]` section):\nbind-address = 127.0.0.1\nThen restart the service:\n# systemctl restart mysqld\nWarning: Applying firewall changes or modifying service configuration requires reloading firewalld or restarting the database service, which will terminate active connections. Limiting network reachability or binding to localhost prevents remote clients from establishing database connections."}, "name": "CVE-2026-101722", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "mysql8.4", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "mysql", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "mysql", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Affected", "package_name": "mariadb10.11", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Affected", "package_name": "mariadb11.8", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-10-20T21:22:31Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-101722\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-101722\nhttps://www.oracle.com/security-alerts/cpuoct2026.html"], "statement": "Red Hat evaluates this vulnerability as having a Moderate security impact because exploitation requires existing authenticated credentials, and the blast radius is confined to partial data read access without the ability to modify records or cause a denial of service. In standard enterprise deployments, supported Red Hat Enterprise Linux releases do not ship the affected upstream branches containing this connection handling routine. Consequently, default production systems remain unaffected.", "threat_severity": "Moderate"}

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