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, 3.4.5, and 3.5.10, the ReadableByteBuf.readLength() and ReadableByteBuf.readIntLengthEncodedNotNull() methods narrowed the protocol's unsigned 8-byte length-encoded integer to a Java int without checking that the value fit a non-negative integer. Values above Integer.MAX_VALUE could wrap to a negative or unrelated length that downstream allocation and read paths used. A malicious or compromised server, or a machine-in-the-middle attacker, could trigger NegativeArraySizeException, out-of-bounds failures, or oversized allocation behavior in client connection handling. This issue is fixed in versions 3.3.7, 3.4.5, and 3.5.10.
Published: 2026-10-29
Score: 5.9 Medium
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

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Tracking

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Advisories

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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, 3.4.5, and 3.5.10, the ReadableByteBuf.readLength() and ReadableByteBuf.readIntLengthEncodedNotNull() methods narrowed the protocol's unsigned 8-byte length-encoded integer to a Java int without checking that the value fit a non-negative integer. Values above Integer.MAX_VALUE could wrap to a negative or unrelated length that downstream allocation and read paths used. A malicious or compromised server, or a machine-in-the-middle attacker, could trigger NegativeArraySizeException, out-of-bounds failures, or oversized allocation behavior in client connection handling. This issue is fixed in versions 3.3.7, 3.4.5, and 3.5.10.
Title MariaDB Connector/J: Length-encoded integers larger than Integer.MAX_VALUE were truncated before being used as lengths
Weaknesses CWE-130
CWE-190
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: 2026-10-29T20:52:22.903Z

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

Link: CVE-2026-119279

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-29T21:17:21.387

Modified: 2026-10-29T21:17:21.387

Link: CVE-2026-119279

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

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

Weaknesses
  • CWE-130

    Improper Handling of Length Parameter Inconsistency

  • CWE-190

    Integer Overflow or Wraparound