---
id: CVE-2026-101781
title: >-
  Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL
  (component: Server: Group Replication GCS)
summary: >-
  Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL
  (component: Server: Group Replication GCS).  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…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
vendor: Oracle Corporation
product: MySQL Server
affected:
  - mysql_server 8.4.0-8.4.12
  - mysql_server 9.7.0-9.7.3
  - mysql_server 26.7.0-26.7.1
  - mysql_cluster 8.0.0-8.0.49
  - mysql_cluster 8.4.0-8.4.12
  - mysql_cluster 9.7.0-9.7.3
  - mysql_cluster 26.7.0-26.7.1
published: '2026-10-20'
updated: '2026-10-20'
sourceUpdated: '2026-10-20T21:22:53.686Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-101781'
references:
  - url: 'https://www.oracle.com/security-alerts/cpuoct2026.html'
    label: Oracle Advisory
tags:
  - cve.org
ingestedAt: '2026-10-20T22:23:33.922Z'
---

## Overview

Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Server: Group Replication GCS).  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 unauthenticated attacker with access to the physical communication segment attached to the hardware where the MySQL Server, MySQL Cluster executes to compromise MySQL Server, MySQL Cluster.  Successful attacks of this vulnerability can result in takeover of MySQL Server, MySQL Cluster. CVSS 3.1 Base Score 8.8 (Confidentiality, Integrity and Availability impacts).  CVSS Vector: (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

## Affected

- `mysql_server 8.4.0-8.4.12`
- `mysql_server 9.7.0-9.7.3`
- `mysql_server 26.7.0-26.7.1`
- `mysql_cluster 8.0.0-8.0.49`
- `mysql_cluster 8.4.0-8.4.12`
- `mysql_cluster 9.7.0-9.7.3`
- `mysql_cluster 26.7.0-26.7.1`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.