CVE-2026-61144 Oracle Corporation CVE debrief

Who should care

Administrators and users of MySQL Server and MySQL Cluster versions 9.7.0-9.7.1 should be aware of this vulnerability and take necessary actions to mitigate the risk. This includes applying patches or updates provided by Oracle, restricting access to the MySQL Server and MySQL Cluster to only necessary personnel, and monitoring the system for any suspicious activity.

Technical summary

The vulnerability is caused by a weakness in the Server: Optimizer component of MySQL Server and MySQL Cluster. The vulnerability can be exploited remotely with high privileges, and the impact is on availability. The CVSS Vector is CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H, indicating that the vulnerability can be exploited remotely with high privileges, and the impact is on availability. This vulnerability affects MySQL Server and MySQL Cluster versions 9.7.0-9.7.1.

Defensive priority

Medium priority should be given to patching or mitigating this vulnerability, as it can be exploited by high privileged attackers to cause a denial of service.

Recommended defensive actions

• Apply the patches or updates provided by Oracle to fix the vulnerability.
• Restrict access to the MySQL Server and MySQL Cluster to only necessary personnel.
• Monitor the system for any suspicious activity.
• Consider implementing additional security measures to prevent exploitation.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.

Evidence notes

The CVE record was published on 2026-07-21T22:18:45.763Z and was last modified on 2026-07-27T17:40:37.907Z. The NVD entry is currently Analyzed. This vulnerability affects MySQL Server and MySQL Cluster versions 9.7.0-9.7.1. The vulnerability is located in the Server: Optimizer component. A high privileged attacker with network access via multiple protocols can exploit this vulnerability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server and MySQL Cluster. The CVSS 3.1 Base Score is 4.9, indicating a MEDIUM severity. The CVSS Vector is CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H. Administrators and users of MySQL Server and MySQL Cluster versions 9.7.0-9.7.1 should be aware of this vulnerability and take necessary actions to mitigate the risk.

Official resources