---
id: "CVE-2026-101637"
kind: "vulnerability"
aliases: ["CVE-2026-101637"]
title: "MySQL Server InnoDB flaw lets privileged users crash database or alter data"
severity: "medium"
cvss: 5.5
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["database", "mysql", "package", "self-hosted"]
not_affected_if: ["default-config"]
published_at: "2026-10-20T22:18:17+00:00"
first_seen_at: "2026-10-23T21:57:22+00:00"
updated_at: "2026-10-25T04:12:20+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-101637", "first_seen_at": "2026-10-23T21:57:22+00:00"}]
---

# MySQL Server InnoDB flaw lets privileged users crash database or alter data

A flaw in the InnoDB storage engine of MySQL Server and MySQL Cluster can be triggered over the network by a highly privileged account. Successful exploitation can crash or hang the server and allow unauthorized changes to some stored data.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Run `SELECT VERSION();` on each MySQL Server and MySQL Cluster node and compare against the affected versions 9.7.0-9.7.3 and 26.7.0-26.7.1
- Check whether the server is listed in the affected MySQL Cluster 9.7.0-9.7.3 or 26.7.0-26.7.1 builds

## Fix

- Upgrade MySQL Server to a release newer than `9.7.3` or `26.7.1` once Oracle publishes the fixed build (unknown fixed version in the sources)
- Upgrade MySQL Cluster on the same schedule (unknown fixed version in the sources)

## Timeline

- 2026-10-23T21:57:22+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-101637

## From the sources

Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: InnoDB).  Supported versions that are affected are MySQL Server: 9.7.0-9.7.3, 26.7.0-26.7.1; MySQL Cluster: 9.7.0-9.7.3 and  26.7.0-26.7.1. Easily exploitable vulnerability allows high privileged attacker with network access via multiple protocols to compromise MySQL Server, MySQL Cluster.  Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server, MySQL Cluster as well as  unauthorized update, insert or delete access to some of MySQL Server, MySQL Cluster accessible data. CVSS 3.1 Base Score 5.5 (Integrity and Availability impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H).

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_