CVE-2026-101755

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Denial of Service in MySQL Server

Publication date: 2026-10-20

Last updated on: 2026-10-30

Assigner: Oracle

Description

Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Client programs). Supported versions that are affected are MySQL Server: 26.7.0-26.7.1; MySQL Cluster: 26.7.0-26.7.1. Difficult to exploit 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 5.3 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H).

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Meta Information

Published

2026-10-20

Last Modified

2026-10-30

Generated

2026-11-10

AI Q&A

2026-10-21

EPSS Evaluated

2026-11-08

NVD

CVE-2026-101755

EUVD

EUVD-2026-106156

Affected Vendors & Products

Vendor	Product	Version / Range
oracle	mysql_cluster	From 26.7.0 (inc) to 26.7.1 (inc)
oracle	mysql_server	From 26.7.0 (inc) to 26.7.1 (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 MySQL Server and MySQL Cluster versions 26.7.0 to 26.7.1. It allows a low-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 26.7.0 to 26.7.1. To detect it, check the installed version of MySQL Server or MySQL Cluster on your system. Use commands like 'mysql --version' or 'mysql-cluster --version' to verify the version. If the version falls within the affected range, the system is vulnerable.

Impact Analysis

If exploited, this vulnerability can disrupt database operations by making the MySQL Server or Cluster unavailable, leading to service interruptions and potential data access issues.

Compliance Impact

This vulnerability causes denial-of-service (DoS) conditions in MySQL Server and MySQL Cluster, leading to service disruptions. Such disruptions may impact data availability, which is critical for compliance with standards like GDPR (data availability) and HIPAA (system availability for protected health information). However, the provided CVE details do not explicitly link this vulnerability to specific compliance violations or regulatory impacts.

Mitigation Strategies

Upgrade MySQL Server and MySQL Cluster to versions beyond 26.7.1 to address the vulnerability. Apply the latest patches from Oracle as soon as possible.

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