CVE-2026-47023

Analyzed Analyzed - Analysis Complete

Denial of Service in MySQL Server

Publication date: 2026-07-21

Last updated on: 2026-07-27

Assigner: Oracle

Description

Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Server: Replication). Supported versions that are affected are MySQL Server: 8.4.0-8.4.10, 9.7.0-9.7.1; MySQL Cluster: 8.0.0-8.0.47, 8.4.0-8.4.10 and 9.7.0-9.7.1. 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

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-07-21

Last Modified

2026-07-27

Generated

2026-08-11

AI Q&A

2026-07-22

EPSS Evaluated

2026-08-09

NVD

CVE-2026-47023

EUVD

EUVD-2026-46511

Affected Vendors & Products

Vendor	Product	Version / Range
oracle	mysql_server	From 8.4.0 (inc) to 8.4.10 (inc)
oracle	mysql_server	9.7.0
oracle	mysql_server	9.7.1
oracle	mysql_cluster	From 8.0.0 (inc) to 8.0.47 (inc)
oracle	mysql_cluster	From 8.4.0 (inc) to 8.4.10 (inc)
oracle	mysql_cluster	9.7.0
oracle	mysql_cluster	9.7.1

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-400	The product does not properly control the allocation and maintenance of a limited resource.

Attack-Flow Graph

Executive Summary

This is a denial-of-service (DoS) vulnerability in Oracle MySQL Server and MySQL Cluster. It allows a high-privileged attacker with network access to crash the database server repeatedly or cause it to hang, making it unavailable for legitimate users.

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 (8.4.0-8.4.10, 9.7.0-9.7.1 for Server; 8.0.0-8.0.47, 8.4.0-8.4.10, 9.7.0-9.7.1 for Cluster). Use commands like 'mysql --version' or 'mysqld --version' to check the version.

Impact Analysis

If exploited, this vulnerability could disrupt database operations, leading to downtime for applications relying on MySQL. This may cause data unavailability, service interruptions, and potential loss of productivity.

Compliance Impact

This vulnerability primarily causes denial-of-service (DOS) conditions in MySQL Server and Cluster, leading to system unavailability. While it does not directly expose data, prolonged downtime could impact compliance with GDPR (data processing integrity) and HIPAA (availability of critical health data systems). Organizations must ensure timely patching to maintain operational continuity and regulatory adherence.

Mitigation Strategies

Upgrade MySQL Server and MySQL Cluster to versions not affected by this vulnerability. Specifically, update to versions beyond 8.4.10 for MySQL Server 8.4.x and 9.7.1 for MySQL Server 9.7.x. For MySQL Cluster, update to versions beyond 8.0.47 for 8.0.x and 8.4.10 or 9.7.1 for 8.4.x and 9.7.x respectively.

Hi! I’m here to help you understand CVE-2026-47023. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70