---
id: CVE-2026-101751
title: 'mysql: mysql: Denial of Service in Group Replication (CVE-2026-101751)'
summary: >-
  A flaw was found in MySQL. An authenticated, remote attacker with high
  privileges could cause a complete Denial of Service (DoS) by exploiting a
  vulnerability in the Group Replication component over the network. Successful
  exploitation cau…
severity: medium
cvss: 4.9
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H'
cvssSource: vendor
cwe: CWE-400
vendor: Red Hat
product: Red Hat Enterprise Linux 10
affected:
  - enterprise_linux 10
  - enterprise_linux 9
published: '2026-10-20'
updated: '2026-10-22'
sourceUpdated: '2026-10-22T22:18:55+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-101751.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-101751.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-101751'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2557217'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-101751'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-101751'
  - url: 'https://www.oracle.com/security-alerts/cpuoct2026.html'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00434
epssPercentile: 0.37539
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-22T17:26:12.302577Z'
ingestedAt: '2026-10-20T22:23:33.933Z'
---

## Overview

A flaw was found in MySQL. An authenticated, remote attacker with high privileges could cause a complete Denial of Service (DoS) by exploiting a vulnerability in the Group Replication component over the network. Successful exploitation causes the server or cluster to hang or crash repeatedly, disrupting database availability.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9 · updated 2026-10-22 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-101751.json)

**mysql: mysql: Denial of Service in Group Replication** — rated Moderate by Red Hat. Released 2026-10-20, updated 2026-10-22.

Affected:

- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 9

No fix planned:

- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 9

Not affected:

- Red Hat Enterprise Linux 6
- Red Hat Hardened Images

## Remediation

Affected