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vuln-cve/data/2026/55xxx/CVE-2026-55858.json
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{
"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": "2026-09-01T02:06:07.389Z"
},
"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"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-09-01T02:05:48.275903Z",
"id": "CVE-2026-55858",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-09-01T02:06:07.389Z"
}
}
]
}
}
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