CVE-2026-47012: Medium severity Oracle MySQL Server vulnerability

Q: Which deployments are affected?

Affected supported versions are MySQL Server 8.4.0 through 8.4.10 and 9.7.0 through 9.7.1. MySQL Cluster is affected in versions 8.0.0 through 8.0.47, 8.4.0 through 8.4.10, and 9.7.0 through 9.7.1.

Q: What level of access does an attacker need?

Exploitation requires a high-privileged attacker with network access to the affected MySQL Server or MySQL Cluster instance via multiple protocols. No user interaction is required, but the attack complexity is high.

Q: What is the expected impact if exploitation succeeds?

A successful attack 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.

Published Jul 21, 2026

Updated

Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Server: Optimizer). Supported versions that are affected are MySQL Server: 8.4.0-8.4.10, 9.7.0-9.7.1; MySQL Cluster: 8.0.0-8.0.47, 8.4.0-8.4.10 and 9.7.0-9.7.1. Difficult to exploit 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 4.4 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H).

Affected Software

9 affected components

Oracle MySQL Server>=8.4.0<=8.4.10, >=9.7.0<=9.7.1

Oracle MySQL Cluster>=8.0.0<=8.0.47, >=8.4.0<=8.4.10, >=9.7.0<=9.7.1

Oracle MySQL Server>=8.4.0<=8.4.10

Oracle MySQL Server=9.7.0

Oracle MySQL Server=9.7.1

Oracle MySQL Cluster>=8.0.0<=8.0.47

Oracle MySQL Cluster>=8.4.0<=8.4.10

Oracle MySQL Cluster=9.7.0

Oracle MySQL Cluster=9.7.1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Compensating control
Mitigate the availability impact (hang/crash) of the vulnerability in Oracle MySQL by reducing network exposure to the MySQL Server/MySQL Cluster ports—e.g., restrict access at the firewall/ACL to only trusted hosts that require connectivity.

Event History

Jul 21, 2026

CVE Published

via MITRE·09:33 PM

Data Sourced

via MITRE·09:33 PM

DescriptionSeverity

Data Sourced

via Red Hat·10:07 PM

DescriptionSeverityAffected Software

Data Sourced

via NVD·10:17 PM

DescriptionSeverityWeaknessAffected Software

Frequently Asked Questions

Which deployments are affected?

Affected supported versions are MySQL Server 8.4.0 through 8.4.10 and 9.7.0 through 9.7.1. MySQL Cluster is affected in versions 8.0.0 through 8.0.47, 8.4.0 through 8.4.10, and 9.7.0 through 9.7.1.

What level of access does an attacker need?

Exploitation requires a high-privileged attacker with network access to the affected MySQL Server or MySQL Cluster instance via multiple protocols. No user interaction is required, but the attack complexity is high.

What is the expected impact if exploitation succeeds?

A successful attack 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.

CVE-2026-47012: Medium severity Oracle MySQL Server vulnerability

Affected Software

Remediation

Event History

Frequently Asked Questions

Which deployments are affected?

What level of access does an attacker need?

What is the expected impact if exploitation succeeds?

Company

Resources

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Frequently Asked Questions

Which deployments are affected?

What level of access does an attacker need?

What is the expected impact if exploitation succeeds?