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[ CVE-2026-119281 · Published 29 Oct 2026 ]

MariaDB Connector/J: Server could switch character_set_results away from UTF-8 without the client noticing

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 3.5.11, the connector assumed result bytes were UTF-8 but guarded only changes to character_set_client. It did not reject non-UTF-8 character_set_results changes and relied on the server's global session_track_system_variables configuration to report character-set changes. A malicious or compromised server, or a machine-in-the-middle attacker, could suppress tracking or change the result charset so application strings differed from the returned bytes, potentially defeating application-side validation or escaping that depended on the decoded values. This issue is fixed in versions 3.3.7, 3.4.5, and 3.5.11.

[ 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-grfq-r75j-rw9x
  • org.mariadb.jdbc:mariadb-java-client mavenAffected >= 3.4.0, < 3.4.5 · fixed in 3.4.5 · GHSA-grfq-r75j-rw9x
  • org.mariadb.jdbc:mariadb-java-client mavenAffected >= 3.5.0, < 3.5.11 · fixed in 3.5.11 · GHSA-grfq-r75j-rw9x

[ References ]References