Description
Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Client programs). Supported versions that are affected are MySQL Server: 8.4.0-8.4.12, 9.7.0-9.7.3, 26.7.0-26.7.1; MySQL Cluster: 8.0.0-8.0.49, 8.4.0-8.4.12, 9.7.0-9.7.3 and 26.7.0-26.7.1. 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: 2026-10-20
Score: 4.4 Medium
EPSS: < 1% Very Low
KEV: No
Impact: Denial of Service
Action: Patch Now
AI Analysis

Impact

A vulnerability exists in Oracle MySQL Server and MySQL Cluster client programs that allows a high‑privileged attacker with network access to trigger a hang or crash, resulting in a full denial of service. The flaw does not provide code execution, but it can temporarily or permanently interrupt the availability of the database services, impacting business continuity. The vulnerability corresponds to CWE-284 (Improper Access Control) and CWE-400 (Uncontrolled Resource Consumption). The weakness is reflected in a CVSS 3.1 base score of 4.4, with the vector indicating a network attack vector, high attack complexity, high privilege needed, no user interaction, and an availability impact only.

Affected Systems

Oracle Corporation MySQL Server versions 8.4.0 through 8.4.12, 9.7.0 through 9.7.3, and 26.7.0 through 26.7.1, as well as MySQL Cluster versions 8.0.0 through 8.0.49, 8.4.0 through 8.4.12, 9.7.0 through 9.7.3, and 26.7.0 through 26.7.1 are affected. Multiple network protocols can be used by an attacker to reach the vulnerable client components.

Risk and Exploitability

The current CVSS score of 4.4 indicates a moderate severity that primarily affects availability. The EPSS score of < 1% indicates a very low exploit probability. Because the vulnerability is not listed in the CISA KEV catalog, the overall risk remains low to moderate. Successful exploitation requires an attacker to have high privilege on the network and access to one of the supported protocols, suggesting that exposure to untrusted networks or insufficient network segmentation increases the risk. If exploited, the services may hang or crash repeatedly until restarted, disrupting database operations.

Generated by OpenCVE AI on October 23, 2026 at 02:15 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Apply the official Oracle patch for MySQL Server and MySQL Cluster as published in the CPU Oct 2026 advisory.
  • Restrict network access to MySQL ports by configuring firewall rules to allow only trusted hosts.
  • Restart MySQL services to ensure the patch is loaded and monitor logs for abnormal restarts or hang events.

Generated by OpenCVE AI on October 23, 2026 at 02:15 UTC.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

History

Fri, 23 Oct 2026 00:45:00 +0000

Type Values Removed Values Added
Title MySQL Server and Cluster Denial of Service via Client Programs mysql: mysql: Denial of Service via client programs
References
Metrics threat_severity

None

 threat_severity

Moderate

Thu, 22 Oct 2026 18:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-284
Metrics ssvc

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

Wed, 21 Oct 2026 02:00:00 +0000

Type Values Removed Values Added
Title MySQL Server and Cluster Denial of Service via Client Programs
Weaknesses CWE-400

Tue, 20 Oct 2026 21:30:00 +0000

Type Values Removed Values Added
Description Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Client programs). Supported versions that are affected are MySQL Server: 8.4.0-8.4.12, 9.7.0-9.7.3, 26.7.0-26.7.1; MySQL Cluster: 8.0.0-8.0.49, 8.4.0-8.4.12, 9.7.0-9.7.3 and 26.7.0-26.7.1. 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: 2026-10-22T17:32:09.043Z

Reserved: 2026-09-28T15:40:09.504Z

Link: CVE-2026-101754

cve-icon Vulnrichment

Updated: 2026-10-22T17:26:19.312Z

cve-icon NVD

Status : Analyzed

Published: 2026-10-20T22:18:30.540

Modified: 2026-10-28T18:20:04.327

Link: CVE-2026-101754

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-10-20T21:22:43Z

Links: CVE-2026-101754 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-10-23T02:30:15Z

Weaknesses
  • CWE-284

    Improper Access Control

  • CWE-400

    Uncontrolled Resource Consumption