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[ CVE-2026-119279 · Published 29 Oct 2026 ]

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

CVSS 5.9 EPSS <1%1 agency advisoryFix available

[ Description ]Official 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.

[ Fixes ]Fixes and patches

[ Advisories ]Government CERT advisories

[ Packages ]Affected open-source packages

  • org.mariadb.jdbc:mariadb-java-client mavenAffected >= 3.0.0, < 3.3.7 · fixed in 3.3.7 · GHSA-797x-p4mc-jwpm
  • org.mariadb.jdbc:mariadb-java-client mavenAffected >= 3.4.0, < 3.4.5 · fixed in 3.4.5 · GHSA-797x-p4mc-jwpm
  • org.mariadb.jdbc:mariadb-java-client mavenAffected >= 3.5.0, < 3.5.10 · fixed in 3.5.10 · GHSA-797x-p4mc-jwpm

[ References ]References