CVE-2026-47064

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: Optimizer). 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 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).

CVSS Scores

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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-2026-47064

EUVD

EUVD-2026-46550

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-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 denial-of-service (DoS) vulnerability in Oracle MySQL Server and MySQL Cluster. It affects the Server: Optimizer component and allows low-privileged attackers with network access to cause repeated crashes or hangs in the database, making it unavailable.

Detection Guidance

This vulnerability affects MySQL Server and MySQL Cluster versions listed in the CVE. Detection requires checking installed versions against the affected ranges (e.g., MySQL Server 8.4.0-8.4.10, 9.7.0-9.7.1). Use commands like 'mysql --version' or check package managers (e.g., 'dpkg -l | grep mysql-server' for Debian/Ubuntu).

Impact Analysis

If exploited, this vulnerability can disrupt database operations by causing frequent crashes or hangs. This leads to downtime, data unavailability, and potential loss of service for applications relying on MySQL.

Compliance Impact

This vulnerability could impact compliance by causing data unavailability, which may violate availability requirements in GDPR and HIPAA. Downtime could lead to breaches of service-level agreements or regulatory obligations for data access and integrity.

Mitigation Strategies

Upgrade MySQL Server and MySQL Cluster to versions 8.4.11 or later for MySQL Server 8.4.x, 9.7.2 or later for MySQL Server 9.7.x, and 8.0.48 or later for MySQL Cluster 8.0.x. Apply patches from Oracle as soon as possible.

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