Oracle MySQL Server/MySQL Cluster up to 9.7.1 Server Optimizer denial of service

Summaryinfo

A vulnerability categorized as critical has been discovered in Oracle MySQL Server and MySQL Cluster up to 9.7.1. This impacts an unknown function of the component Server Optimizer. The manipulation results in denial of service. This vulnerability is cataloged as CVE-2026-61093. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in Oracle MySQL Server and MySQL Cluster up to 9.7.1. It has been classified as critical. Affected is an unknown functionality of the component Server Optimizer. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on 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: 9.7.0-9.7.1; MySQL Cluster: 9.7.0-9.7.1. 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).

The advisory is shared for download at oracle.com. This vulnerability is traded as CVE-2026-61093 since 07/08/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. 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 07/22/2026). The MITRE ATT&CK project declares the attack technique as T1499.

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

The vulnerability is also documented in the vulnerability database at CNNVD (CNNVD-2026-99083748). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• Database Software

Vendor

• Oracle

Name

• MySQL Cluster
• MySQL Server

Version

• 9.7.0
• 9.7.1

License

• open-source

Website

• Vendor: https://www.oracle.com

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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