---
id: CVE-2026-101749
title: >-
  mysql: mysql: Denial of Service via security encryption component
  (CVE-2026-101749)
summary: >-
  A flaw was found in MySQL. A remote attacker with high privileges and network
  access can exploit this vulnerability in the security encryption component to
  cause a Denial of Service (DoS). Successful exploitation can lead to a
  complete han…
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-617
vendor: Red Hat
product: MySQL Server
affected:
  - mysql_server 26.7.0-26.7.1
  - mysql_cluster 26.7.0-26.7.1
published: '2026-10-20'
updated: '2026-10-23'
sourceUpdated: '2026-10-23T19:21:06+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-101749.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-101749.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-101749'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2557619'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-101749'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-101749'
  - url: 'https://www.oracle.com/security-alerts/cpuoct2026.html'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00434
epssPercentile: 0.37492
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-22T17:26:08.623001Z'
ingestedAt: '2026-10-20T22:23:33.934Z'
---

## Overview

A flaw was found in MySQL. A remote attacker with high privileges and network access can exploit this vulnerability in the security encryption component to cause a Denial of Service (DoS). Successful exploitation can lead to a complete hang or repeatable crash of the server, rendering database services unavailable to legitimate users.

## Vendor advisories

- **Red Hat VEX** · Moderate · updated 2026-10-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-101749.json)

**mysql: mysql: Denial of Service via security encryption component** — rated Moderate by Red Hat. Released 2026-10-20, updated 2026-10-23.

Not affected:

- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 9
- Red Hat Hardened Images

## Remediation

Refer to the advisory for fix availability.