Description
Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Server: Optimizer). Supported versions that are affected are MySQL Server: 9.7.0-9.7.1; MySQL Cluster: 9.7.0-9.7.1. 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

Oracle MySQL’s Server and Cluster products contain a flaw in the Optimizer component that can allow a low‑privileged attacker with network access to force the database to hang or repeatedly crash, causing a denial of service. The vulnerability does not affect confidentiality or integrity, but it removes the availability of the MySQL service to authorized users.

Affected Systems

The affected products are Oracle MySQL Server and Oracle MySQL Cluster. Supported releases that are vulnerable are MySQL Server 9.7.0 to 9.7.1 and MySQL Cluster 9.7.0 to 9.7.1.

Risk and Exploitability

The CVSS 3.1 base score is 6.5, indicating moderate severity. The EPSS score of less than 1% suggests a low overall probability of exploitation, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog. Nevertheless, the attack vector is network‑based, requiring only low privileges; an attacker who can reach the MySQL protocols can trigger the crash and permanently disrupt service.

Generated by OpenCVE AI on August 4, 2026 at 01:51 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Apply the latest Oracle MySQL update that addresses the Optimizer bug.
  • Restrict network exposure of MySQL Server and Cluster services to trusted hosts or through a VPN.
  • Monitor MySQL logs for repeated hang or crash events and follow up with configuration or connectivity checks.

Generated by OpenCVE AI on August 4, 2026 at 01:51 UTC.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

History

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

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

None

 threat_severity

Moderate

Mon, 27 Jul 2026 11:15:00 +0000

Type Values Removed Values Added
Title Low‑Privilege Network Denial of Service via Optimizer Bug 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 22:00:00 +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: 9.7.0-9.7.1; MySQL Cluster: 9.7.0-9.7.1. 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: 2026-07-23T19:19:55.630Z

Reserved: 2026-07-08T15:51:55.613Z

Link: CVE-2026-61093

cve-icon Vulnrichment

Updated: 2026-07-23T19:19:51.704Z

cve-icon NVD

No data.

cve-icon Redhat

Severity : Moderate

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

Links: CVE-2026-61093 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-08-04T02:00:12Z

Weaknesses
  • CWE-400

    Uncontrolled Resource Consumption

  • CWE-770

    Allocation of Resources Without Limits or Throttling