CVE-2026-101731

Analyzed Analyzed - Analysis Complete

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: Server: Optimizer). 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 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).

CVSS Scores

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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-2026-101731

EUVD

EUVD-2026-106132

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 the Server: Optimizer component. It allows a high-privileged attacker with network access to cause a denial of service (DOS) by crashing or hanging the server repeatedly.

Detection Guidance

This vulnerability affects MySQL Server and MySQL Cluster versions listed in the CVE. Detection involves checking the installed version of MySQL Server or MySQL Cluster against the affected versions. Use commands like 'mysql --version' or 'mysqld --version' to check the server version. For MySQL Cluster, check the management node or data node version using similar commands.

Impact Analysis

The vulnerability can lead to frequent crashes or hangs of MySQL Server or MySQL Cluster, disrupting database operations and causing downtime. This affects availability and can impact services relying on these databases.

Compliance Impact

This vulnerability causes denial-of-service (DoS) conditions in MySQL Server and Cluster, leading to service disruptions. Such disruptions may impact data availability, which is a critical requirement under GDPR and HIPAA. Unauthorized downtime could result in non-compliance with availability and integrity controls.

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.

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