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CVE-2026-119279

MariaDB Connector/J: Length-encoded integers larger than Integer.MAX_VALUE were truncated before being used as lengths

Impact

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.

Affected packages

EcosystemPackageAffectedFixed in
mavenorg.mariadb.jdbc:mariadb-java-client>= 3.0.0, < 3.3.73.3.7

Affected products

VendorProductAffected versions
Mariadb-CorporationMariadb-Connector-J
from 3.4.0, before 3.4.5
from 3.5.0, before 3.5.10
from 3.0.0, before 3.3.7

Weakness classification

CWE-130CWE-190

References