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 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).
Published: 2026-07-21
Score: 4.9 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

The flaw resides in the Optimizer component of MySQL Server and MySQL Cluster. A high‑privileged attacker with network access can exploit unvalidated input to cause the optimizer to hang or terminate, leading to a full denial of service. The weakness is a resource‑exhaustion type (CWE‑400) that degrades availability without affecting confidentiality or integrity.

Affected Systems

Oracle MySQL Server and Oracle MySQL Cluster, versions 9.7.0 through 9.7.1, are affected. The issue applies only to these releases and any installation that allows the database to be reached over network protocols such as the native MySQL protocol.

Risk and Exploitability

The CVSS 3.1 Base Score of 4.9 indicates a moderate risk driven by availability impact. With an EPSS score of less than 1 % the likelihood of exploitation is considered low, and the vulnerability is not listed in the CISA KEV catalog. Attackers must possess high‑privilege credentials and network access, making the threat most potent against exposed or poorly secured MySQL instances.

Generated by OpenCVE AI on August 2, 2026 at 19:47 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Upgrade to or apply Oracle MySQL CPU patches newer than 9.7.1 to address the optimizer flaw.
  • Restrict network connectivity to the MySQL service by firewall or ACLs, allowing only trusted IP addresses.
  • Implement monitoring to detect unexpected MySQL restarts or crashes, and set alerts for rapid incident response.

Generated by OpenCVE AI on August 2, 2026 at 19:47 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 Vulnerability in MySQL 9.7 mysql: Optimizer unspecified vulnerability (CPU Jul 2026)
Weaknesses CWE-770
References
Metrics threat_severity

None

 threat_severity

Moderate

Sun, 26 Jul 2026 05:45:00 +0000

Type Values Removed Values Added
Title Denial of Service via Optimizer Vulnerability in MySQL 9.7

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 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).
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': 4.9, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/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: 2026-07-23T19:10:20.474Z

Reserved: 2026-07-08T15:51:55.615Z

Link: CVE-2026-61128

cve-icon Vulnrichment

Updated: 2026-07-23T19:10:16.769Z

cve-icon NVD

No data.

cve-icon Redhat

Severity : Moderate

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

Links: CVE-2026-61128 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-08-02T20:00:12Z

Weaknesses
  • CWE-400

    Uncontrolled Resource Consumption

  • CWE-770

    Allocation of Resources Without Limits or Throttling