---
id: "CVE-2026-101777"
kind: "vulnerability"
aliases: ["CVE-2026-101777"]
title: "MySQL Server: encryption component flaw allows crash and partial data read"
severity: "medium"
cvss: 5.5
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["database", "mysql", "package", "self-hosted"]
not_affected_if: ["database-not-network-exposed", "versions-outside-range"]
published_at: "2026-10-20T22:18:33+00:00"
first_seen_at: "2026-10-23T21:57:23+00:00"
updated_at: "2026-10-25T04:12:17+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-101777", "first_seen_at": "2026-10-23T21:57:23+00:00"}]
---

# MySQL Server: encryption component flaw allows crash and partial data read

A flaw in the MySQL Server Encryption component lets a highly privileged, network-connected user crash or hang the server and read a subset of accessible data. The affected versions listed are MySQL Server and MySQL Cluster 9.7.0 through 9.7.3 and 26.7.0 through 26.7.1.

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

## How to check

- Run `SELECT VERSION();` in MySQL and compare against the affected ranges 9.7.0-9.7.3 and 26.7.0-26.7.1
- Check whether MySQL Cluster is in use alongside the server

## Fix

- Upgrade MySQL Server and MySQL Cluster to a release after the affected ranges; the sources do not name the fixed version
- Check the Oracle Critical Patch Update advisory for the exact fixed build

## Timeline

- 2026-10-23T21:57:23+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-101777

## From the sources

Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Server: Security: Encryption).  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 and  unauthorized read access to a subset of MySQL Server, MySQL Cluster accessible data. CVSS 3.1 Base Score 5.5 (Confidentiality and Availability impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/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_