---
id: CVE-2026-101776
title: 'mysql: mysql: Denial of Service in Group Replication plugin (CVE-2026-101776)'
summary: >-
  A flaw was found in the MySQL Group Replication plugin. A remote attacker with
  high privileges and network access can exploit this vulnerability across
  multiple protocols. Successful exploitation allows the attacker to cause the
  service to…
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-835
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: '2026-10-22T22:19:36+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-101776.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-101776.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-101776'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2557128'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-101776'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-101776'
  - url: 'https://www.oracle.com/security-alerts/cpuoct2026.html'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00287
epssPercentile: 0.21108
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-22T17:26:40.229193Z'
ingestedAt: '2026-10-20T22:23:33.924Z'
---

## Overview

A flaw was found in the MySQL Group Replication plugin. A remote attacker with high privileges and network access can exploit this vulnerability across multiple protocols. Successful exploitation allows the attacker to cause the service to hang or crash repeatedly, resulting in a complete Denial of Service (DoS).

## 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-2026-101776.json)

**mysql: mysql: Denial of Service in Group Replication plugin** — 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