CVE-2026-101637

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Denial of Service in Oracle MySQL Server

Publication date: 2026-10-20

Last updated on: 2026-10-21

Assigner: Oracle

Description

Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: InnoDB). Supported versions that are affected are MySQL Server: 9.7.0-9.7.3, 26.7.0-26.7.1; MySQL Cluster: 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 as well as unauthorized update, insert or delete access to some of MySQL Server, MySQL Cluster accessible data. CVSS 3.1 Base Score 5.5 (Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H).

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Meta Information

Published

2026-10-20

Last Modified

2026-10-21

Generated

2026-11-10

AI Q&A

2026-10-21

EPSS Evaluated

2026-11-08

NVD

CVE-2026-101637

EUVD

EUVD-2026-106045

Affected Vendors & Products

Vendor	Product	Version / Range
Oracle Corporation	MySQL Server	9.7.0-9.7.3
Oracle Corporation	MySQL Server	26.7.0-26.7.1
Oracle Corporation	MySQL Cluster	9.7.0-9.7.3
Oracle Corporation	MySQL Cluster	26.7.0-26.7.1

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 Oracle MySQL Server and MySQL Cluster (InnoDB component). It affects versions 9.7.0-9.7.3 and 26.7.0-26.7.1. A high-privileged attacker with network access can exploit it to cause a denial of service (DOS) or perform unauthorized data modifications.

Detection Guidance

This vulnerability affects MySQL Server and MySQL Cluster versions 9.7.0-9.7.3 and 26.7.0-26.7.1. Detection involves checking the installed version of MySQL Server or MySQL Cluster on your system. Use commands like 'mysql --version' for MySQL Server or 'ndb_mgm --version' for MySQL Cluster to verify the version. If the version falls within the affected range, the system is vulnerable.

Impact Analysis

The vulnerability allows attackers to crash MySQL servers repeatedly or modify data without authorization. This can disrupt database operations, cause downtime, and lead to data integrity issues.

Compliance Impact

This vulnerability could impact compliance by allowing unauthorized data access or modification, violating integrity and availability requirements in GDPR and HIPAA. Organizations may face penalties for failing to protect sensitive data.

Mitigation Strategies

Upgrade MySQL Server and MySQL Cluster to versions beyond 9.7.3 and 26.7.1 respectively to address the vulnerability.

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