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. Easily exploitable vulnerability allows unauthenticated 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 7.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
Published: 2026-10-20
Score: 7.5 High
EPSS: < 1% Very Low
KEV: No
Impact: Denial of Service (hang or crash)
Action: Apply Patch
AI Analysis

Impact

A flaw in the client program components of Oracle MySQL Server and MySQL Cluster allows an unauthenticated attacker with network access to trigger a hang or repeatable crash, resulting in a complete denial of service. The vulnerability can be exploited via multiple database protocols exposed on the network. This results in a loss of availability for applications relying on the affected MySQL instances, but does not compromise confidentiality or integrity.

Affected Systems

Affected vendors include Oracle Corporation for its MySQL Server and MySQL Cluster products. Vulnerable versions are MySQL Server 8.4.0 through 8.4.12, 9.7.0 through 9.7.3, and 26.7.0 through 26.7.1; and MySQL Cluster 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.

Risk and Exploitability

The CVSS score of 7.5 indicates a high severity impact on availability. The EPSS score of <1% indicates a very low current exploitation probability, and the vulnerability is not listed in the CISA KEV catalog, suggesting no known widespread exploitation yet. The likely attack vector is remote network access to the MySQL service, performed by an unauthenticated actor using supported database protocols. Successful exploitation would cause the server or cluster to become unresponsive, requiring a restart or manual intervention.

Generated by OpenCVE AI on October 23, 2026 at 02:59 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Apply the vendor‑supplied fix or upgrade to a non‑vulnerable release of MySQL Server or MySQL Cluster.
  • Restrict inbound traffic to the MySQL service by configuring the server to bind only to trusted interfaces or by applying firewall rules that limit exposure to unauthenticated attackers.
  • Implement automated monitoring and restart of the MySQL service upon crash detection, and consider using resource limits or a load‑balancing proxy to isolate the impact of a single instance failure.

Generated by OpenCVE AI on October 23, 2026 at 02:59 UTC.

Tracking

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Advisories

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History

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

Type Values Removed Values Added
Title Remote Denial of Service Vulnerability in Oracle MySQL Server and Cluster mysql: mysql: Denial of Service via multiple protocols
Weaknesses CWE-400
References
Metrics threat_severity

None

 ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

threat_severity

Important

Thu, 22 Oct 2026 12:30:00 +0000

Type Values Removed Values Added
Title Remote Denial of Service Vulnerability in Oracle MySQL Server and Cluster

Thu, 22 Oct 2026 10:30:00 +0000

Type Values Removed Values Added
Title Denial of Service via Unauthenticated Network Access in Oracle MySQL Server and Cluster
Weaknesses CWE-716

Wed, 21 Oct 2026 21:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-284

Wed, 21 Oct 2026 04:30:00 +0000

Type Values Removed Values Added
Title Denial of Service via Unauthenticated Network Access in Oracle MySQL Server and Cluster
Weaknesses CWE-716

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. Easily exploitable vulnerability allows unauthenticated 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 7.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/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': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/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: 2026-10-22T18:50:22.640Z

Reserved: 2026-09-28T15:40:09.499Z

Link: CVE-2026-101679

cve-icon Vulnrichment

Updated: 2026-10-21T21:04:32.092Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-20T22:18:22.350

Modified: 2026-10-22T19:17:34.620

Link: CVE-2026-101679

cve-icon Redhat

Severity : Important

Publid Date: 2026-10-20T21:22:16Z

Links: CVE-2026-101679 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-10-23T03:00:11Z

Weaknesses
  • CWE-284

    Improper Access Control

  • CWE-400

    Uncontrolled Resource Consumption