CVE-2026-101785
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Denial of Service in Oracle MySQL Server

Publication date: 2026-10-20

Last updated on: 2026-10-22

Assigner: Oracle

Description
Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Server: JSON). 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. Easily exploitable vulnerability allows low privileged attacker with network access via multiple protocols to compromise MySQL Server, MySQL Cluster. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all MySQL Server, MySQL Cluster accessible data as well as unauthorized read access to a subset of MySQL Server, MySQL Cluster accessible data and unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server, MySQL Cluster. CVSS 3.1 Base Score 8.3 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H).

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Meta Information

Published
2026-10-20
Last Modified
2026-10-22
Generated
2026-11-10
AI Q&A
2026-10-21
EPSS Evaluated
2026-11-08
NVD
CVE-2026-101785
EUVD
EUVD-2026-106186

Affected Vendors & Products

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Exploitability

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

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Executive Summary

This is a vulnerability in the MySQL Server and MySQL Cluster products affecting specific versions. It involves the JSON component of the Server. A low-privileged attacker with network access can exploit it to compromise the system, leading to unauthorized data access, modification, or deletion, and potential denial of service.

Impact Analysis

If you use affected versions of MySQL Server or MySQL Cluster, an attacker could read, modify, or delete critical data, or cause the system to crash repeatedly. This could disrupt operations and compromise data integrity and confidentiality.

Compliance Impact

This vulnerability could lead to unauthorized data access or modification, violating GDPR's data protection principles and HIPAA's security requirements. Non-compliance risks include legal penalties, reputational damage, and loss of trust.

Mitigation Strategies

Upgrade MySQL Server and MySQL Cluster to versions 8.4.13, 9.7.4, or 26.7.2, or later, as these versions address the vulnerability. Apply the latest patches from Oracle to ensure protection against this issue.

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