CVE-2026-107815
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Stack Buffer Overflow in MariaDB CONNECT Engine

Publication date: 2026-10-09

Last updated on: 2026-10-09

Assigner: GitHub, Inc.

Description
MariaDB server is a community developed fork of MySQL server. From 10.6.1 until 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, and 13.0.2, the CONNECT engine's DOS table type used an incorrect boundary check that permitted a one-byte null write beyond a stack buffer at an attacker-controlled offset. An authenticated user able to use the CONNECT engine could cause a crash and potentially remote code execution. This issue is fixed in versions 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, and 13.0.2.

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Meta Information

Published
2026-10-09
Last Modified
2026-10-09
Generated
2026-10-09
AI Q&A
2026-10-09
EPSS Evaluated
N/A
NVD
CVE-2026-107815
EUVD
EUVD-2026-95909

Affected Vendors & Products

Showing 6 associated CPEs
Vendor Product Version / Range
MariaDB server >= 10.6.1, < 10.6.28
MariaDB server >= 10.11.1, < 10.11.19
MariaDB server >= 11.4.1, < 11.4.13
MariaDB server >= 11.8.1, < 11.8.9
MariaDB server >= 12.3.1, < 12.3.3
MariaDB server >= 13.0.1, < 13.0.2

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-787 The product writes data past the end, or before the beginning, of the intended buffer.

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Executive Summary

This vulnerability is an out-of-bounds write flaw in MariaDB's CONNECT storage engine. It allows an authenticated user to write one null byte beyond a stack buffer at a controlled offset when using DOS table types. This occurs due to incorrect boundary checks in versions between 10.6.1 and 10.6.27, 10.11.1 and 10.11.18, 11.4.1 and 11.4.12, 11.8.1 and 11.8.8, 12.3.1 and 12.3.2, and 13.0.1.

Detection Guidance

Check MariaDB server version using 'mysql --version' or 'mariadb --version'. If running versions between 10.6.1-10.6.27, 10.11.1-10.11.18, 11.4.1-11.4.12, 11.8.1-11.8.8, 12.3.1-12.3.2, or 13.0.1, the system is vulnerable.

Impact Analysis

An attacker could exploit this to crash the MariaDB server or potentially execute arbitrary code remotely. This requires an authenticated user with access to the CONNECT engine. The impact includes service disruption, data corruption, or unauthorized system access if code execution is achieved.

Compliance Impact

This vulnerability could lead to remote code execution, unauthorized data access, or system crashes. For GDPR, it may result in unauthorized processing or disclosure of personal data, violating Articles 5 and 32. For HIPAA, it could expose protected health information, violating the Security Rule's integrity and confidentiality requirements.

Mitigation Strategies
  • Upgrade MariaDB to patched versions: 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, or 13.0.2.
  • Disable the CONNECT engine plugin if not required by editing the MariaDB configuration file and removing 'plugin-load-add=ha_connect.so'.

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