{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-55858",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-06-17T16:44:40.995Z",
        "datePublished": "2026-08-28T22:46:40.114Z",
        "dateUpdated": "2026-08-28T22:46:40.114Z"
    },
    "containers": {
        "cna": {
            "title": "MariaDB Connector/J: Inappropriate Encoding for Output Context in org.mariadb.jdbc:mariadb-java-client",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-838",
                            "lang": "en",
                            "description": "CWE-838: Inappropriate Encoding for Output Context",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "HIGH",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "NONE",
                        "baseScore": 5.9,
                        "baseSeverity": "MEDIUM",
                        "confidentialityImpact": "NONE",
                        "integrityImpact": "HIGH",
                        "privilegesRequired": "NONE",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/mariadb-corporation/mariadb-connector-j/security/advisories/GHSA-xvr9-35cr-46v9",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/mariadb-corporation/mariadb-connector-j/security/advisories/GHSA-xvr9-35cr-46v9"
                },
                {
                    "name": "https://github.com/mariadb-corporation/mariadb-connector-j/commit/300716bef1e1d0370a41be7863b88aa2d55fbb69",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/mariadb-corporation/mariadb-connector-j/commit/300716bef1e1d0370a41be7863b88aa2d55fbb69"
                },
                {
                    "name": "https://github.com/mariadb-corporation/mariadb-connector-j/commit/7b3c69221b5463ee03472654040b3f6b9e5329c7",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/mariadb-corporation/mariadb-connector-j/commit/7b3c69221b5463ee03472654040b3f6b9e5329c7"
                },
                {
                    "name": "https://github.com/mariadb-corporation/mariadb-connector-j/commit/8cfd9df697372ad4ed09fe87a34b34babb6d43d6",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/mariadb-corporation/mariadb-connector-j/commit/8cfd9df697372ad4ed09fe87a34b34babb6d43d6"
                },
                {
                    "name": "https://github.com/mariadb-corporation/mariadb-connector-j/commit/c555c9b477521be0c35c3a5461f9f46681553607",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/mariadb-corporation/mariadb-connector-j/commit/c555c9b477521be0c35c3a5461f9f46681553607"
                },
                {
                    "name": "https://github.com/mariadb-corporation/mariadb-connector-j/releases/tag/2.7.14",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/mariadb-corporation/mariadb-connector-j/releases/tag/2.7.14"
                },
                {
                    "name": "https://github.com/mariadb-corporation/mariadb-connector-j/releases/tag/3.3.5",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/mariadb-corporation/mariadb-connector-j/releases/tag/3.3.5"
                },
                {
                    "name": "https://github.com/mariadb-corporation/mariadb-connector-j/releases/tag/3.4.3",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/mariadb-corporation/mariadb-connector-j/releases/tag/3.4.3"
                },
                {
                    "name": "https://github.com/mariadb-corporation/mariadb-connector-j/releases/tag/3.5.9",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/mariadb-corporation/mariadb-connector-j/releases/tag/3.5.9"
                },
                {
                    "name": "https://jira.mariadb.org/browse/CONJ-1317",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://jira.mariadb.org/browse/CONJ-1317"
                }
            ],
            "affected": [
                {
                    "vendor": "mariadb-corporation",
                    "product": "mariadb-connector-j",
                    "versions": [
                        {
                            "version": "< 2.7.14",
                            "status": "affected"
                        },
                        {
                            "version": ">= 3.0.0-alpha, < 3.3.5",
                            "status": "affected"
                        },
                        {
                            "version": ">= 3.4.0, < 3.4.3",
                            "status": "affected"
                        },
                        {
                            "version": ">= 3.5.0, < 3.5.9",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-08-28T22:46:40.114Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "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."
                }
            ],
            "source": {
                "advisory": "GHSA-xvr9-35cr-46v9",
                "discovery": "UNKNOWN"
            }
        }
    }
}