CVE-2026-46863: Oracle MySQL Cluster

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Server: Connection Handling). Supported versions that are affected are MySQL Server: 8.4.0-8.4.9, 9.0.0-9.7.0; MySQL Cluster: 8.0.11-8.0.46, 8.4.0-8.4.9 and 9.0.0-9.7.0. Easily exploitable vulnerability allows unauthenticated 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 hang or frequently repeatable crash (complete DOS) of MySQL Server, MySQL Cluster. CVSS 3.1 Base Score 7.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

Affected products

• Oracle MySQL Cluster: from 8.0.11, up to and including 8.0.46; from 8.4.0, up to and including 8.4.9; from 9.0.0, up to and including 9.7.0
• Oracle MySQL Server: from 8.4.0, up to and including 8.4.9; from 9.0.0, up to and including 9.7.0

Published 2026-06-17. Last modified 2026-06-18.