{"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"}}}}

{}

{"affected": [{"affectedData": [{"product": "mariadb-connector-j", "vendor": "mariadb-corporation", "versions": [{"status": "affected", "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"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "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."}], "id": "CVE-2026-55858", "lastModified": "2026-08-28T23:17:08.827", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 2.2, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-08-28T23:17:08.827", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/mariadb-corporation/mariadb-connector-j/commit/300716bef1e1d0370a41be7863b88aa2d55fbb69"}, {"source": "security-advisories@github.com", "url": "https://github.com/mariadb-corporation/mariadb-connector-j/commit/7b3c69221b5463ee03472654040b3f6b9e5329c7"}, {"source": "security-advisories@github.com", "url": "https://github.com/mariadb-corporation/mariadb-connector-j/commit/8cfd9df697372ad4ed09fe87a34b34babb6d43d6"}, {"source": "security-advisories@github.com", "url": "https://github.com/mariadb-corporation/mariadb-connector-j/commit/c555c9b477521be0c35c3a5461f9f46681553607"}, {"source": "security-advisories@github.com", "url": "https://github.com/mariadb-corporation/mariadb-connector-j/releases/tag/2.7.14"}, {"source": "security-advisories@github.com", "url": "https://github.com/mariadb-corporation/mariadb-connector-j/releases/tag/3.3.5"}, {"source": "security-advisories@github.com", "url": "https://github.com/mariadb-corporation/mariadb-connector-j/releases/tag/3.4.3"}, {"source": "security-advisories@github.com", "url": "https://github.com/mariadb-corporation/mariadb-connector-j/releases/tag/3.5.9"}, {"source": "security-advisories@github.com", "url": "https://github.com/mariadb-corporation/mariadb-connector-j/security/advisories/GHSA-xvr9-35cr-46v9"}, {"source": "security-advisories@github.com", "url": "https://jira.mariadb.org/browse/CONJ-1317"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-838"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"created": "2026-08-29T00:30:17.154198+00:00", "updated": "2026-08-29T00:30:17.154204+00:00", "vendors": []}