---
id: CVE-2026-101774
title: >-
  mysql: mysql: Denial of service via Pluggable Authentication component
  (CVE-2026-101774)
summary: >-
  A flaw was found in the Pluggable Authentication component of MySQL. An
  unauthenticated remote attacker could exploit this vulnerability across
  multiple network protocols to cause the server to hang or crash repeatedly,
  resulting in a Deni…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H'
cvssSource: vendor
cwe: CWE-303
vendor: Red Hat
product: Red Hat Enterprise Linux 10
affected:
  - enterprise_linux 10
  - enterprise_linux 9
published: '2026-10-20'
updated: '2026-10-23'
sourceUpdated: '2026-10-23T19:21:16+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-101774.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-101774.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-101774'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2557877'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-101774'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-101774'
  - url: 'https://www.oracle.com/security-alerts/cpuoct2026.html'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00283
epssPercentile: 0.2071
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-22T17:26:36.264532Z'
ingestedAt: '2026-10-20T22:23:33.925Z'
---

## Overview

A flaw was found in the Pluggable Authentication component of MySQL. An unauthenticated remote attacker could exploit this vulnerability across multiple network protocols to cause the server to hang or crash repeatedly, resulting in a Denial of Service (DoS). In addition, successful exploitation may allow unauthorized modification, insertion, or deletion of accessible database records.

## 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 2026-10-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-101774.json)

**mysql: mysql: Denial of service via Pluggable Authentication component** — rated Moderate by Red Hat. Released 2026-10-20, updated 2026-10-23.

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