CVE-2026-101677

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MySQL Connector/J Unauthorized Data Manipulation Vulnerability

Publication date: 2026-10-20

Last updated on: 2026-10-21

Assigner: Oracle

Description

Vulnerability in the MySQL Connectors product of Oracle MySQL (component: Connector/J). The supported version that is affected is 26.7.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise MySQL Connectors. Successful attacks require human interaction from a person other than the attacker. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of MySQL Connectors accessible data. CVSS 3.1 Base Score 4.3 (Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N).

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Meta Information

Published

2026-10-20

Last Modified

2026-10-21

Generated

2026-11-10

AI Q&A

2026-10-21

EPSS Evaluated

2026-11-08

NVD

CVE-2026-101677

EUVD

EUVD-2026-106081

Affected Vendors & Products

Vendor	Product	Version / Range
Oracle Corporation	MySQL Connectors	26.7.0

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 Oracle MySQL Connectors, specifically version 26.7.0. It allows an unauthenticated attacker with network access to potentially modify some data in the MySQL Connectors if a user is tricked into performing an action.

Detection Guidance

This vulnerability requires human interaction and network access to exploit. Detection may involve monitoring for unusual data modifications in MySQL Connector/J. Check for unauthorized updates, inserts, or deletes in accessible data. Review logs for suspicious connections or queries from untrusted sources.

Impact Analysis

An attacker could exploit this to change data in the MySQL Connectors, which might lead to incorrect information being stored or processed. This requires the victim to interact with a malicious link or file.

Compliance Impact

This vulnerability allows unauthorized modification of data, which could lead to violations of integrity requirements in GDPR and HIPAA. Unauthorized data changes may result in non-compliance with data integrity and protection obligations under these regulations.

Mitigation Strategies

Upgrade MySQL Connectors to a version unaffected by this vulnerability. Check Oracle's security advisories for the latest patches and apply them immediately. Monitor network traffic for unusual activity related to MySQL Connector/J access.

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