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4.9
CVE-2026-101730: MySQL Server and Cluster can be crashed remotely
CVE-2026-101730 · published 15 days ago
Summary
Versions of MySQL Server and MySQL Cluster listed above allow an attacker who already has high-level access on the network to cause the database to stop responding or crash repeatedly. This can make your applications unavailable until the service is restarted. Apply the latest security patches from Oracle or your Linux distribution as soon as possible to fix the issue.
What to do
The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.
Affected software
| Ecosystem | Vendor | Product | Affected versions |
|---|---|---|---|
| – | oracle corporation | mysql server | 8.4.0-8.4.12 |
| – | oracle corporation | mysql cluster | 8.0.0-8.0.49 |
| Ubuntu:26.10 | canonical | mysql-9.7 | All versions |
| Ubuntu:14.04:LTS | canonical | mysql-5.5 | All versions |
| Ubuntu:Pro:16.04:LTS | canonical | mysql-5.7 | All versions |
| Ubuntu:16.04:LTS | canonical | mariadb-10.0 | All versions |
| Ubuntu:16.04:LTS | canonical | percona-server-5.6 | All versions |
| Ubuntu:16.04:LTS | canonical | percona-xtradb-cluster-5.6 | All versions |
| Ubuntu:18.04:LTS | canonical | mariadb-10.1 | All versions |
| Ubuntu:Pro:20.04:LTS | canonical | mysql-8.0 | All versions |
| Ubuntu:20.04:LTS | canonical | mariadb-10.3 | All versions |
| Ubuntu:22.04:LTS | canonical | mariadb-10.6 | All versions |
| Ubuntu:24.04:LTS | canonical | mariadb | All versions |
| Ubuntu:26.04:LTS | canonical | mysql-8.4 | All versions |
Original advisory text
Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Server: Optimizer). Supported versions that are affected are MySQL Server: 8.4.0-8.4.12, 9.7.0-9.7.3, 26.7.0-26...
Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Server: Optimizer). 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).
References
- https://www.oracle.com/security-alerts/cpuoct2026.html Third Party Advisory
- https://ubuntu.com/security/CVE-2026-101730 Third Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2026-101730 Third Party Advisory
Internet-facing
60 days
Internal
At next upgrade
- Not known to be exploited
- Needs hands-on effort to exploit
- Gives an attacker partial control
Type
CWE-284Improper Access Control
Timeline
Published20 Oct 2026
Updated4 Nov 2026
First seen20 Oct 2026
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