Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Server: Telemetry). 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: 8.4.0-8.4.12, 9.7.0-9.7.3 and 26.7.0-26.7.1. Easily exploitable vulnerability allows high privileged attacker with network access via multiple protocols to compromise MySQL Server, MySQL Cluster. Successful attacks of this vulnerability can result in unauthorized ability to cause a partial denial of service (partial DOS) of MySQL Server, MySQL Cluster. CVSS 3.1 Base Score 2.7 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L).

A flaw was found in the MySQL Server Telemetry component. A remote attacker with high privileges and network access can exploit this vulnerability over multiple protocols to cause a partial Denial of Service (DoS). Successful exploitation can lead to unauthorized degradation of database service availability.

This vulnerability is rated as Low severity because successful exploitation requires an attacker to possess elevated administrative privileges and only results in a partial degradation of database availability without compromising data integrity or confidentiality. In standard Red Hat Enterprise Linux deployments, database instances are protected by authentication controls and restricted network topologies, substantially limiting exposure. Furthermore, the issue is confined to the telemetry feature and cannot be leveraged for arbitrary code execution or total service termination. Red Hat Enterprise Linux 10 Affected mysql8.4 Red Hat Enterprise Linux 6 Not affected mysql Red Hat Enterprise Linux 9 Affected mysql Red Hat Hardened Images Not affected mariadb10.11 Red Hat Hardened Images Not affected mariadb11.8 https://www.cve.org/CVERecord?id=CVE-2026-101779 https://nvd.nist.gov/vuln/detail/CVE-2026-101779 https://www.oracle.com/security-alerts/cpuoct2026.html