---
id: CVE-2026-101728
title: 'mysql: mysql: Denial of Service in Pluggable Auth (CVE-2026-101728)'
summary: >-
  A flaw was found in MySQL's Pluggable Auth component. An authenticated remote
  attacker with low privileges can exploit this vulnerability over the network
  across multiple protocols. Successful exploitation allows the attacker to
  cause the …
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/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: '2026-10-23T19:21:03+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-101728.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-101728.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-101728'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2557786'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-101728'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-101728'
  - url: 'https://www.oracle.com/security-alerts/cpuoct2026.html'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.0041
epssPercentile: 0.3505
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-22T17:43:34.255318Z'
ingestedAt: '2026-10-20T22:23:33.940Z'
---

## Overview

A flaw was found in MySQL's Pluggable Auth component. An authenticated remote attacker with low privileges can exploit this vulnerability over the network across multiple protocols. Successful exploitation allows the attacker to cause the database service to hang or repeatedly crash, resulting in a 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 2026-10-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-101728.json)

**mysql: mysql: Denial of Service in Pluggable Auth** — 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