Description
Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Server: Optimizer). Supported versions that are affected are MySQL Server: 9.0.0-9.7.1; MySQL Cluster: 9.0.0-9.7.1. 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).
Published: 2026-07-21
Score: 6.5 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

A low‑privileged attacker who can reach the database over the network can target the optimizer module in Oracle MySQL Server and MySQL Cluster to trigger a hang or a repeatedly reproducible crash, effectively denying service to legitimate users. The impact is limited to availability; confidentiality and integrity remain intact.

Affected Systems

Oracle MySQL Server versions 9.0.0 through 9.7.1 and Oracle MySQL Cluster versions 9.0.0 through 9.7.1 are vulnerable. The weakness resides in the server’s optimizer component.

Risk and Exploitability

The CVSS v3.1 base score of 6.5 indicates moderate severity. The EPSS score of less than 1% suggests a low likelihood of exploitation in the wild. The vulnerability is not listed in the CISA KEV catalog. The attack vector is network‑based, requiring only low‑privileged access through any protocol that can communicate with the MySQL instance. Successful exploitation results in a denial of service that can be repeated consistently by an attacker with equivalent access.

Generated by OpenCVE AI on August 2, 2026 at 22:54 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Apply the Oracle MySQL patch released in CPU‑July‑2026 to upgrade to a version newer than 9.7.1.
  • Update all MySQL Server and MySQL Cluster instances to the patched version as soon as it is available.
  • Restrict external network access to the MySQL instances by configuring firewalls or network segmentation, ensuring only trusted hosts or service accounts can connect.

Generated by OpenCVE AI on August 2, 2026 at 22:54 UTC.

Tracking

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Advisories

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History

Tue, 28 Jul 2026 00:15:00 +0000

Type Values Removed Values Added
Title Denial of Service via Optimizer Exploit in MySQL Server and Cluster mysql: Optimizer unspecified vulnerability (CPU Jul 2026)
Weaknesses CWE-770
References
Metrics threat_severity

None

 threat_severity

Moderate

Fri, 24 Jul 2026 01:15:00 +0000

Type Values Removed Values Added
Title Denial of Service via Optimizer Exploit in MySQL Server and Cluster

Thu, 23 Jul 2026 21:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-400
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Tue, 21 Jul 2026 21:45:00 +0000

Type Values Removed Values Added
Description Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Server: Optimizer). Supported versions that are affected are MySQL Server: 9.0.0-9.7.1; MySQL Cluster: 9.0.0-9.7.1. 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).
First Time appeared Oracle
Oracle mysql Cluster
Oracle mysql Server
CPEs cpe:2.3:a:oracle:mysql_cluster:*:*:*:*:*:*:*:*
cpe:2.3:a:oracle:mysql_server:*:*:*:*:*:*:*:*
Vendors & Products Oracle
Oracle mysql Cluster
Oracle mysql Server
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

Subscriptions

Oracle Mysql Cluster Mysql Server
cve-icon MITRE

Status: PUBLISHED

Assigner: oracle

Published:

Updated: 2026-07-23T17:46:32.772Z

Reserved: 2026-07-08T15:51:40.529Z

Link: CVE-2026-60311

cve-icon Vulnrichment

Updated: 2026-07-23T17:46:25.657Z

cve-icon NVD

No data.

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-07-21T00:00:00Z

Links: CVE-2026-60311 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-08-02T23:00:04Z

Weaknesses
  • CWE-400

    Uncontrolled Resource Consumption

  • CWE-770

    Allocation of Resources Without Limits or Throttling