CVE-2026-101776: Medium severity Oracle MySQL Server vulnerability
Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Server: Group Replication Plugin). 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 high 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 4.9 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/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 vulnerability?
An attacker needs high privileges and network access to the affected MySQL Server or MySQL Cluster instance. No user interaction is required.
What is the practical impact of a successful attack?
A successful attack can cause the affected MySQL Server or MySQL Cluster system to hang or crash repeatedly, resulting in a complete denial of service. The provided CVSS information indicates no confidentiality or integrity impact.
Which deployments should be prioritized for review?
Prioritize MySQL Server deployments running 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 deployments running 8.0.0 through 8.0.49 as well as those same 8.4, 9.7, and 26.7 ranges. The affected component is the Server Group Replication Plugin.