MariaDB Connector/J is used to connect applications developed in Java to MariaDB and MySQL databases. Prior to 2.7.14, 3.3.5, 3.4.3, and 3.5.9, the connector encodes and decodes protocol text and performs client-side escaping under the assumption that the connection character set is UTF-8. The server can report a mid-session change to character_set_client through OK-packet session-state tracking, including a change caused by SET NAMES, a stored routine or trigger, server configuration, or a hostile server. If character_set_client changes to a non-UTF-8 value, the driver continues to read and write UTF-8 while the server interprets the same bytes under another encoding, causing silent data corruption and a client/server charset-confusion mismatch that can defeat byte-wise quoting or escaping. The fix accepts only utf8, utf8mb3, or utf8mb4 after initialization; any other value causes SQLException with SQLState 08000 and closes the connection. This issue is fixed in versions 2.7.14, 3.3.5, 3.4.3, and 3.5.9.

oracle CPUOct2026: MySQL Cluster >=9.7.0|<=9.7.4

oracle CPUOct2026: MySQL Cluster >=8.0.0|<=8.0.38

oracle CPUOct2026: MySQL Cluster >=8.4.0|<=8.4.13

oracle CPUOct2026: MySQL Cluster >=8.0.0|<=8.0.50

oracle CPUOct2026: MySQL Cluster >=26.7.0|<=26.7.2

oracle CPUOct2026: MySQL Server >=8.4.0|<=8.4.13

oracle CPUOct2026: MySQL Server >=26.7.0|<=26.7.2

oracle CPUOct2026: MySQL Server >=9.7.0|<=9.7.4

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - MariaDB Connector/J is used to connect applications developed in Java to MariaDB and MySQL databases.
    Prior to 2.7.14, 3.3.5, 3.4.3, and 3.5.9, the connector encodes and decodes protocol text and performs
    client-side escaping under the assumption that the connection character set is UTF-8. The server can
    report a mid-session change to character_set_client through OK-packet session-state tracking, including a
    change caused by SET NAMES, a stored routine or trigger, server configuration, or a hostile server. If
    character_set_client changes to a non-UTF-8 value, the driver continues to read and write UTF-8 while the
    server interprets the same bytes under another encoding, causing silent data corruption and a
    client/server charset-confusion mismatch that can defeat byte-wise quoting or escaping. The fix accepts
    only utf8, utf8mb3, or utf8mb4 after initialization; any other value causes SQLException with SQLState
    08000 and closes the connection. This issue is fixed in versions 2.7.14, 3.3.5, 3.4.3, and 3.5.9.
    (CVE-2026-55858)

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - MariaDB Connector/J is used to connect applications developed in Java to MariaDB and MySQL databases.
    Prior to 2.7.14, 3.3.5, 3.4.3, and 3.5.9, the connector encodes and decodes protocol text and performs     client-side escaping under the assumption that the connection character set is UTF-8. The server can     report a mid-session change to character_set_client through OK-packet session-state tracking, including a     change caused by SET NAMES, a stored routine or trigger, server configuration, or a hostile server. If     character_set_client changes to a non-UTF-8 value, the driver continues to read and write UTF-8 while the     server interprets the same bytes under another encoding, causing silent data corruption and a     client/server charset-confusion mismatch that can defeat byte-wise quoting or escaping. The fix accepts     only utf8, utf8mb3, or utf8mb4 after initialization; any other value causes SQLException with SQLState     08000 and closes the connection. This issue is fixed in versions 2.7.14, 3.3.5, 3.4.3, and 3.5.9.
    (CVE-2026-55858)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
461407	Echo: org.mariadb.jdbc:mariadb-java-client: security update to 2.7.14	Tenable Cloud Security	Echo Local Security Checks	Local	medium
461407	Echo: org.mariadb.jdbc:mariadb-java-client: security update to 2.7.14	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	medium
342544	Linux Distros Unpatched Vulnerability : CVE-2026-55858	Nessus	Misc.	Local	medium

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CVE-2026-55858

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