Description
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).
Published: 2026-07-21
Score: 4.4 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

A flaw in the Optimizer component of Oracle’s MySQL Server and MySQL Cluster allows an attacker with high‑privileged credentials who can reach the database over network protocols to trigger a hang or repeatable crash, wholly disrupting availability. The vulnerability does not compromise data confidentiality or integrity; it purely causes a denial of service.

Affected Systems

The vulnerability affects Oracle MySQL Server versions 8.4.0 through 8.4.10 and 9.7.0 through 9.7.1, as well as MySQL Cluster versions 8.0.0 through 8.0.47, 8.4.0 through 8.4.10, and 9.7.0 through 9.7.1. All installations of these product lines running an affected version and exposed to the network are at risk.

Risk and Exploitability

The CVSS base score of 4.4 highlights a moderate availability impact. EPSS indicates an exploitation probability of less than 1%, suggesting very low prevalence in the wild. The vulnerability is not listed in CISA’s KEV catalog. The attack requires network access to the database and high‑privileged credentials; without such preconditions, the likelihood of successful exploitation remains limited.

Generated by OpenCVE AI on August 3, 2026 at 00:03 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Verify your MySQL Server and MySQL Cluster versions against the affected ranges
  • Obtain and install Oracle’s latest security update for MySQL that addresses the Optimizer crash issue
  • Restrict network access to the database by limiting connections to trusted hosts and enforcing least‑privilege credentials
  • Monitor database logs and resource usage for signs of hangs or repeated failures and apply patches promptly upon release

Generated by OpenCVE AI on August 3, 2026 at 00:03 UTC.

Tracking

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Advisories

No advisories yet.

History

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

Type Values Removed Values Added
Title Denial-of-Service via Optimizer-Induced Crash in Oracle MySQL mysql: Optimizer unspecified vulnerability (CPU Jul 2026)
Weaknesses CWE-617
References
Metrics threat_severity

None

 threat_severity

Moderate

Fri, 24 Jul 2026 02:45:00 +0000

Type Values Removed Values Added
Title Denial-of-Service via Optimizer-Induced Crash in Oracle MySQL

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: 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).
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': 4.4, 'vector': 'CVSS:3.1/AV:N/AC:H/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: 2026-07-23T15:08:09.894Z

Reserved: 2026-05-18T15:55:10.317Z

Link: CVE-2026-47012

cve-icon Vulnrichment

Updated: 2026-07-23T15:07:19.692Z

cve-icon NVD

No data.

cve-icon Redhat

Severity : Moderate

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

Links: CVE-2026-47012 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-08-03T00:15:17Z

Weaknesses
  • CWE-400

    Uncontrolled Resource Consumption

  • CWE-617

    Reachable Assertion