CVE-2026-101800

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{"bugzilla": {"description": "mysql: mysql: unauthorized data access via improper privilege controls", "id": "2557388", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2557388"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.8", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N", "status": "draft"}, "cwe": "CWE-269", "details": ["Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Server: Security: Privileges). Supported versions that are affected are MySQL Server: 8.4.0-8.4.12, 9.7.0-9.7.3, 26.7.0-26.7.1; MySQL Cluster: 8.0.0-8.0.49, 8.4.0-8.4.12, 9.7.0-9.7.3 and 26.7.0-26.7.1. Difficult to exploit 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 creation, deletion or modification access to critical data or all MySQL Server, MySQL Cluster accessible data as well as unauthorized access to critical data or complete access to all MySQL Server, MySQL Cluster accessible data. CVSS 3.1 Base Score 6.8 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N).", "A flaw was found in the Security: Privileges component of MySQL. This issue may allow an attacker to impact the confidentiality, integrity, and/or availability of MySQL Server depending on the vulnerability details. Refer to the Oracle CPU advisory for component-specific impact."], "mitigation": {"lang": "en:us", "value": "To reduce exposure to this vulnerability, restrict network reachability to the MySQL database server so that only trusted hosts and application tiers can establish connections.\n1. Restrict incoming traffic using firewalld to only authorized IP addresses:\n```bash\nfirewall-cmd --permanent --add-rich-rule='rule family=\"ipv4\" source address=\"<trusted_ip>\" port port=\"3306\" protocol=\"tcp\" accept'\nfirewall-cmd --reload\n```\n2. If remote database connections are not required, bind the MySQL daemon to the local loopback interface by adding the following line under the `[mysqld]` section in `/etc/my.cnf` or `/etc/my.cnf.d/mysql-server.cnf`:\n```ini\n[mysqld]\nbind-address = 127.0.0.1\n```\nApply the configuration change by restarting the daemon:\n```bash\nsystemctl restart mysqld\n```\nCaveats:\nRestricting access to specific addresses or binding to localhost prevents unauthorized hosts from reaching the service, but external applications requiring database access must be explicitly permitted.\nWarning: Modifying firewall rules or restarting the mysqld service will terminate existing database sessions and temporarily disrupt connectivity for running services."}, "name": "CVE-2026-101800", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "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": "Affected", "package_name": "mysql", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Not affected", "package_name": "mariadb10.11", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Not affected", "package_name": "mariadb11.8", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-10-20T21:23:01Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-101800\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-101800\nhttps://www.oracle.com/security-alerts/cpuoct2026.html"], "statement": "Red Hat Product Security rates this vulnerability as Important because an unauthenticated network adversary can alter database records or disrupt service availability, despite the elevated attack complexity involved. In standard Red Hat Enterprise Linux deployments, MySQL is not accessible to public networks by default and requires explicit configuration for remote access or replication clustering. Consequently, systems running in isolated environments or configurations where network traffic to replication endpoints is restricted face lower practical exposure.", "threat_severity": "Moderate"}

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