CVE-2026-119279

Vulnerability 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.

CVSS Score

Related Weaknesses (CWE)

References

• https://github.com/mariadb-corporation/mariadb-connector-j/commit/30d4a883377a9b
• https://github.com/mariadb-corporation/mariadb-connector-j/commit/bfd9f5ad666a6f
• https://github.com/mariadb-corporation/mariadb-connector-j/commit/dbbadc3e215c47
• https://github.com/mariadb-corporation/mariadb-connector-j/releases/tag/3.3.7
• https://github.com/mariadb-corporation/mariadb-connector-j/releases/tag/3.4.5
• https://github.com/mariadb-corporation/mariadb-connector-j/releases/tag/3.5.10
• https://github.com/mariadb-corporation/mariadb-connector-j/security/advisories/G