Oracle MySQL Server/MySQL Cluster 9.0.0-9.7.1 Server Optimizer resource consumption

Summaryinfo

A vulnerability marked as critical has been reported in Oracle MySQL Server and MySQL Cluster 9.0.0-9.7.1. Affected by this issue is some unknown functionality of the component Server Optimizer. The manipulation leads to resource consumption. This vulnerability is documented as CVE-2026-60311. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in Oracle MySQL Server and MySQL Cluster 9.0.0-9.7.1 and classified as critical. This issue affects an unknown code of the component Server Optimizer. The manipulation with an unknown input leads to a resource consumption vulnerability. Using CWE to declare the problem leads to CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. Impacted is availability. The summary by CVE is:

Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Server: Optimizer). Supported versions that are affected are MySQL Server: 9.0.0-9.7.1; MySQL Cluster: 9.0.0-9.7.1. Easily exploitable 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 ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server, MySQL Cluster. CVSS 3.1 Base Score 6.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).

It is possible to read the advisory at oracle.com. The identification of this vulnerability is CVE-2026-60311 since 07/08/2026. The exploitation is known to be easy. The attack may be initiated remotely. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/22/2026). The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• Database Software

Vendor

• Oracle

Name

• MySQL Cluster
• MySQL Server

Version

• 9.0.0-9.7.1

License

• open-source

Website

• Vendor: https://www.oracle.com

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