Medium 5.9Published Oct 29, 2026

CVE-2026-119281MariaDB Connector/J: Server could switch character_set_results away from UTF-8 without the client noticing

Updated under an hour ago (Oct 30, 2026, 5:50 AM ET)

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No exploitation reported and no EPSS estimate yet.

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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.

CVSS: 5.9 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Weakness (CWE): CWE-838
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Received
Record last updated: Oct 29, 2026
First seen by InfoSec Signals: Oct 29, 2026

Affected products

Affected products

mariadb-corporation mariadb-connector-j mariadb:connector_j (from the name)	from 3.0.0, < 3.3.7; from 3.4.0, < 3.4.5; from 3.5.0, < 3.5.11	CNA record

References

References

https://github.com/mariadb-corporation/mariadb-connector-j/security/advisories/GHSA-grfq-r75j-rw9x	x-refsource-confirm
https://github.com/mariadb-corporation/mariadb-connector-j/commit/af5e565eb171cfc66ea8e948ddc616abed0c4623	x-refsource-misc
https://github.com/mariadb-corporation/mariadb-connector-j/commit/d51b968c1b795c73d24e0b3f960205b7bc82d423	x-refsource-misc
https://github.com/mariadb-corporation/mariadb-connector-j/commit/fdabe74a7df6dce1d6c099f4d0ca1e2acc25919a	x-refsource-misc
https://github.com/mariadb-corporation/mariadb-connector-j/releases/tag/3.3.7	x-refsource-misc
https://github.com/mariadb-corporation/mariadb-connector-j/releases/tag/3.4.5	x-refsource-misc
https://github.com/mariadb-corporation/mariadb-connector-j/releases/tag/3.5.11	x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.