CVE-2026-101730

A flaw was found in the MySQL Server optimizer component. A remote attacker with high privileges can exploit this vulnerability over network protocols to cause the database server to hang or repeatedly crash. This issue results in a complete Denial of Service (DoS) of affected MySQL Server and MySQL Cluster instances.

This vulnerability is rated Moderate rather than Important because successful exploitation requires an attacker to possess high administrative privileges within the database instance. In standard enterprise deployments, access with elevated permissions is typically restricted to authorized database administrators, significantly limiting exposure to untrusted parties. While an authenticated user with sufficient rights could trigger query optimizer errors to crash or hang the database daemon, confidentiality and integrity of stored records remain unaffected.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.