Description
MariaDB Connector/J is used to connect applications developed in Java to MariaDB and MySQL databases. From 3.0.0 until 3.3.7 and 3.4.5, during caching_sha2_password authentication, the authentication-more-data response was treated as a length-encoded byte array, memory was allocated from the server-declared length, and authResult[0] was accessed without ensuring a byte existed. A malicious or compromised server, or a machine-in-the-middle attacker, could declare a very large length or send an empty response before any password was transmitted. The malformed packet could cause excessive allocation or an unchecked ArrayIndexOutOfBoundsException escaping from DriverManager.getConnection(). This issue is fixed in versions 3.3.7 and 3.4.5.
Published: 2026-10-29
Score: 5.9 Medium
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
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Remediation

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History

Thu, 29 Oct 2026 22:45:00 +0000

Type Values Removed Values Added
First Time appeared Mariadb
Mariadb mariadb-connector-j
Mariadb-corporation
Mariadb-corporation mariadb-connector-j
Vendors & Products Mariadb
Mariadb mariadb-connector-j
Mariadb-corporation
Mariadb-corporation mariadb-connector-j

Thu, 29 Oct 2026 21:00:00 +0000

Type Values Removed Values Added
Description MariaDB Connector/J is used to connect applications developed in Java to MariaDB and MySQL databases. From 3.0.0 until 3.3.7 and 3.4.5, during caching_sha2_password authentication, the authentication-more-data response was treated as a length-encoded byte array, memory was allocated from the server-declared length, and authResult[0] was accessed without ensuring a byte existed. A malicious or compromised server, or a machine-in-the-middle attacker, could declare a very large length or send an empty response before any password was transmitted. The malformed packet could cause excessive allocation or an unchecked ArrayIndexOutOfBoundsException escaping from DriverManager.getConnection(). This issue is fixed in versions 3.3.7 and 3.4.5.
Title MariaDB Connector/J: Rogue server can crash the client during caching_sha2_password authentication
Weaknesses CWE-129
CWE-789
References
Metrics cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H'}

Subscriptions

Mariadb Mariadb-connector-j
Mariadb-corporation Mariadb-connector-j
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-10-29T20:50:35.474Z

Reserved: 2026-10-29T18:50:28.064Z

Link: CVE-2026-119278

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-29T21:17:21.237

Modified: 2026-10-29T21:17:21.237

Link: CVE-2026-119278

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-29T22:30:12Z

Weaknesses
  • CWE-129

    Improper Validation of Array Index

  • CWE-789

    Memory Allocation with Excessive Size Value