CVE-2026-101770

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Heap-based Buffer Overflow in Oracle MySQL Server

Publication date: 2026-10-20

Last updated on: 2026-10-30

Assigner: Oracle

Description

Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Client programs). Supported versions that are affected are MySQL Server: 8.4.0-8.4.12, 9.7.0-9.7.3, 26.7.0-26.7.1; MySQL Cluster: 8.0.0-8.0.49, 8.4.0-8.4.12, 9.7.0-9.7.3 and 26.7.0-26.7.1. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise MySQL Server, MySQL Cluster. Successful attacks of this vulnerability can result in takeover of MySQL Server, MySQL Cluster. CVSS 3.1 Base Score 8.1 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H).

CVSS Scores

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Meta Information

Published

2026-10-20

Last Modified

2026-10-30

Generated

2026-11-10

AI Q&A

2026-10-21

EPSS Evaluated

2026-11-08

NVD

CVE-2026-101770

EUVD

EUVD-2026-106171

Affected Vendors & Products

Vendor	Product	Version / Range
oracle	mysql_cluster	From 26.7.0 (inc) to 26.7.1 (inc)
oracle	mysql_cluster	From 8.0.0 (inc) to 8.0.49 (inc)
oracle	mysql_cluster	From 8.4.0 (inc) to 8.4.12 (inc)
oracle	mysql_cluster	From 9.7.0 (inc) to 9.7.3 (inc)
oracle	mysql_server	From 26.7.0 (inc) to 26.7.1 (inc)
oracle	mysql_server	From 8.4.0 (inc) to 8.4.12 (inc)
oracle	mysql_server	From 9.7.0 (inc) to 9.7.3 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-284	The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

Attack-Flow Graph

Executive Summary

This is a vulnerability in MySQL Server and MySQL Cluster where an unauthenticated attacker can remotely exploit it through network access. It allows the attacker to take over the affected systems, potentially leading to full compromise of confidentiality, integrity, and availability.

Detection Guidance

This vulnerability is difficult to detect through standard commands alone due to its nature. Monitor for unusual network traffic or unauthorized access attempts to MySQL ports (default 3306). Check MySQL server logs for unexpected connections or administrative actions. Ensure MySQL versions are updated beyond the affected ranges (8.4.12+, 9.7.3+, 26.7.1+).

Impact Analysis

If you use any of the affected MySQL versions, an attacker could gain full control over your database servers. This could result in data theft, data manipulation, or complete system outages, disrupting your operations and exposing sensitive information.

Compliance Impact

This vulnerability could lead to unauthorized access to personal or sensitive data, violating GDPR and HIPAA requirements. Non-compliance may result in legal penalties, fines, and reputational damage due to data breaches.

Mitigation Strategies

Upgrade MySQL Server and MySQL Cluster to versions beyond the affected ranges (8.4.12, 9.7.3, 26.7.1, 8.0.49). Apply the latest patches from Oracle immediately to prevent exploitation.

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EPSS Chart

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