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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-119281
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-29 21:17:21 UTC
Updated2026-10-29 21:17:21 UTC
DescriptionMariaDB 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.

Risk And Classification

Primary CVSS: v3.1 5.9 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Problem Types: CWE-838 | CWE-838 CWE-838: Inappropriate Encoding for Output Context

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.9MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
3.1CNADECLARED5.9MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Mariadb-corporation Mariadb-connector-j affected >= 3.0.0, < 3.3.7 Not specified
CNA Mariadb-corporation Mariadb-connector-j affected >= 3.4.0, < 3.4.5 Not specified
CNA Mariadb-corporation Mariadb-connector-j affected >= 3.5.0, < 3.5.11 Not specified

References

ReferenceSourceLinkTags
github.com/mariadb-corporation/mariadb-connector-j/commit/d51b968c1b795c... [email protected] github.com
github.com/mariadb-corporation/mariadb-connector-j/commit/fdabe74a7df6dc... [email protected] github.com
github.com/mariadb-corporation/mariadb-connector-j/releases/tag/3.3.7 [email protected] github.com
github.com/mariadb-corporation/mariadb-connector-j/security/advisories/G... [email protected] github.com
github.com/mariadb-corporation/mariadb-connector-j/releases/tag/3.5.11 [email protected] github.com
github.com/mariadb-corporation/mariadb-connector-j/releases/tag/3.4.5 [email protected] github.com
github.com/mariadb-corporation/mariadb-connector-j/commit/af5e565eb171cf... [email protected] github.com
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