---
id: CVE-2026-101773
title: >-
  mysql: MySQL: Denial of Service via the Group Replication plugin
  (CVE-2026-101773)
summary: >-
  A flaw was found in the MySQL Group Replication plugin. An unauthenticated
  attacker located on the adjacent network can exploit this vulnerability to
  compromise the database service. Successful exploitation primarily allows an
  attacker to …
severity: high
cvss: 7.1
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/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: '2026-10-22T22:09:50+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-101773.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-101773.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-101773'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2557345'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-101773'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-101773'
  - url: 'https://www.oracle.com/security-alerts/cpuoct2026.html'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00217
epssPercentile: 0.12118
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-22T17:26:34.688190Z'
ingestedAt: '2026-10-20T22:23:33.926Z'
---

## Overview

A flaw was found in the MySQL Group Replication plugin. An unauthenticated attacker located on the adjacent network can exploit this vulnerability to compromise the database service. Successful exploitation primarily allows an attacker to cause a Denial of Service (DoS) by hanging or repeatedly crashing the server, as well as perform unauthorized modifications to accessible data.

## Vendor advisories

- **Red Hat VEX** · Important · 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-2026-101773.json)

**mysql: MySQL: Denial of Service via the Group Replication plugin** — rated Important 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