CVE-2026-101747

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Denial of Service in Oracle MySQL Server

Publication date: 2026-10-20

Last updated on: 2026-10-28

Assigner: Oracle

Description

Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: InnoDB). 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 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).

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Meta Information

Published

2026-10-20

Last Modified

2026-10-28

Generated

2026-11-10

AI Q&A

2026-10-21

EPSS Evaluated

2026-11-08

NVD

CVE-2026-101747

EUVD

EUVD-2026-106148

Affected Vendors & Products

Vendor	Product	Version / Range
oracle	mysql_cluster	From 26.7.0 (inc) to 26.7.1 (inc)
oracle	mysql_cluster	From 8.0.0 (inc) to 8.0.49 (inc)
oracle	mysql_cluster	From 8.4.0 (inc) to 8.4.12 (inc)
oracle	mysql_cluster	From 9.7.0 (inc) to 9.7.3 (inc)
oracle	mysql_server	From 26.7.0 (inc) to 26.7.1 (inc)
oracle	mysql_server	From 8.4.0 (inc) to 8.4.12 (inc)
oracle	mysql_server	From 9.7.0 (inc) to 9.7.3 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-284	The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

Attack-Flow Graph

Executive Summary

This is a vulnerability in the MySQL Server and MySQL Cluster products affecting specific versions. It is in the InnoDB component and allows a low-privileged attacker with network access to cause a denial of service (DOS) by crashing or hanging the server repeatedly.

Impact Analysis

If exploited, this vulnerability can lead to frequent crashes or hangs of the MySQL Server or Cluster, disrupting database operations and causing downtime. This impacts availability and can affect services relying on these databases.

Compliance Impact

This vulnerability causes denial-of-service (DoS) conditions in MySQL Server and MySQL Cluster, leading to system unavailability. For GDPR, this could impact data processing operations requiring continuous availability. For HIPAA, it may disrupt access to protected health information systems. Both standards emphasize availability and integrity of data, which this vulnerability directly threatens.

Mitigation Strategies

Upgrade MySQL Server and MySQL Cluster to versions 8.4.13, 9.7.4, or 26.7.2 or later to address the vulnerability.

Apply the latest security patches provided by Oracle as soon as possible to prevent exploitation.

Restrict network access to MySQL services by using firewalls or network segmentation to limit exposure.

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