CVE-2026-101620: Medium severity Oracle MySQL MySQL Server vulnerability
Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Server: Optimizer). Supported versions that are affected are MySQL Server: 9.7.0-9.7.3; MySQL Cluster: 9.7.0-9.7.3. 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).
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
debian/mysql-9.7to a version that resolves this vulnerability.Fixed in 9.7.4-2 - Upgrade
Upgrade
ubuntu/mysql-9.7to a version that resolves this vulnerability.Fixed in 9.7.4-0ubuntu0.26.10.1
Event History
Frequently Asked Questions
Who can exploit this issue?
An attacker needs network access to the affected MySQL Server or MySQL Cluster instance and low-privileged credentials. No user interaction is required.
What is the practical impact of successful exploitation?
Successful exploitation can cause the affected service to hang or crash repeatedly, resulting in a complete denial of service. The provided CVSS vector indicates no confidentiality or integrity impact.
Which deployments should be prioritized for remediation?
Prioritize MySQL Server and MySQL Cluster deployments running versions 9.7.0 through 9.7.3 that accept connections from low-privileged network users. The issue is reachable through multiple protocols.