Oracle MySQL Cluster/MySQL Server Server Optimizer privileges management

Summaryinfo

A vulnerability was found in Oracle MySQL Cluster and MySQL Server. It has been declared as problematic. This impacts an unknown function of the component Server Optimizer. Executing a manipulation can lead to privileges management. This vulnerability is registered as CVE-2026-101787. It is possible to launch the attack remotely. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Oracle MySQL Cluster and MySQL Server (version now known). It has been declared as problematic. This vulnerability affects some unknown processing of the component Server Optimizer. The manipulation with an unknown input leads to a privileges management vulnerability. The CWE definition for the vulnerability is CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. As an impact it is known to affect availability. CVE summarizes:

Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Server: Optimizer). 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. 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 hang or frequently repeatable crash (complete DOS) of MySQL Server, MySQL Cluster. CVSS 3.1 Base Score 4.9 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).

The advisory is shared for download at oracle.com. This vulnerability was named CVE-2026-101787 since 09/28/2026. The exploitation appears to be easy. The attack can be initiated remotely. The exploitation requires an enhanced level of successful authentication. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 10/21/2026). The MITRE ATT&CK project declares the attack technique as T1068.

Upgrading eliminates this vulnerability.

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Productinfo

Type

• Database Software

Vendor

• Oracle

Name

• MySQL Cluster
• MySQL Server

License

• open-source

Website

• Vendor: https://www.oracle.com

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