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OpenAdvisories
Medium · 5.9 CVE-2026-119277 EUVD-2026-113384

MariaDB Connector/J: Rogue server can make the client read past the packet through server-declared lengths

Published Oct 29, 2026 · Updated Nov 4, 2026 · Assigned by GitHub_M

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 3.5.11, decoders for OK packet session-state blocks, column definition packets, text row data, or binary row data used server-declared lengths without confirming that the requested bytes remained in the receive buffer. The decoders could position reads, create sub-buffers, or decode strings beyond the packet boundary. A malicious or compromised server, or a machine-in-the-middle attacker, could trigger unchecked ArrayIndexOutOfBoundsException or IllegalArgumentException failures inside JDBC calls and terminate connection handling. This issue is fixed in versions 3.3.7, 3.4.5, and 3.5.11.

Affected products

VendorProductAffectedFixed
mariadb-corporation mariadb-connector-j >= 3.0.0, < 3.3.7, >= 3.4.0, < 3.4.5, >= 3.5.0, < 3.5.11 —

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

ReleasePackageFixed inAdvisory
Debian 14 mariadb-connector-java No fix yet —
Debian 13 mariadb-connector-java No fix yet —
Debian 12 mariadb-connector-java No fix yet —
ReleasePackageFixed inAdvisory
Ubuntu 26.10 mariadb-connector-java No fix yet —
Ubuntu 26.04 LTS mariadb-connector-java No fix yet —
Ubuntu 24.04 LTS mariadb-connector-java No fix yet —
Ubuntu 22.04 LTS mariadb-connector-java No fix yet —
Ubuntu 20.04 LTS mariadb-connector-java No fix yet —
Show 1 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu 18.04 LTS mariadb-connector-java No fix yet —
ReleasePackageFixed inAdvisory
openSUSE Tumbleweed mariadb-java-client 3.5.11-1.1 openSUSE-SU-2026:12401-1

Advisories 2

References