CVE-2026-101679: High severity Oracle MySQL Server vulnerability
Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Client programs). 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 unauthenticated 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 7.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/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
Event History
Frequently Asked Questions
Who can exploit this issue?
An unauthenticated attacker with network access to the affected MySQL Server or MySQL Cluster can exploit it via multiple protocols. No user interaction or existing privileges are required.
What is the likely impact of a successful attack?
Successful exploitation can cause the affected MySQL Server or MySQL Cluster 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 affected MySQL Server and MySQL Cluster instances that are reachable over the network, especially where untrusted users or networks can access supported protocols. The issue is rated high severity with a CVSS 3.1 base score of 7.5.
How can I determine whether an instance is affected?
Check the deployed product and version against the affected ranges: MySQL Server 8.4.0 through 8.4.12, 9.7.0 through 9.7.3, or 26.7.0 through 26.7.1; and MySQL Cluster 8.0.0 through 8.0.49, 8.4.0 through 8.4.12, 9.7.0 through 9.7.3, or 26.7.0 through 26.7.1.