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4 vulnerabilities by org.mariadb
CVE-2026-55860 (GCVE-0-2026-55860)
Vulnerability from nvd – Published: 2026-08-28 22:50 – Updated: 2026-08-28 22:50
VLAI
EPSS
VEX
Title
MariaDB Connector/R2DBC: Cleartext password disclosure to a man-in-the-middle server (clear-text auth plugins not gated on a secure transport)
Summary
MariaDB Connector/R2DBC is a non-blocking MariaDB and MySQL client implemented in Java. Prior to 1.4.1, org.mariadb:r2dbc-mariadb does not gate clear-text password authentication plugins on transport encryption because the AuthenticationPlugin interface has no capability for a plugin to require a secure connection. A hostile or man-in-the-middle MariaDB server can send an AuthSwitchRequest naming mysql_clear_password or dialog (PAM) over a plain-TCP unencrypted connection, and AuthenticationFlow permits ClearPasswordPluginFlow or PamPluginFlow to return the user's password as cleartext bytes on the wire. The disclosed credentials can subsequently be used to authenticate directly to the database server. This issue is fixed in version 1.4.1.
Severity
5.9 (Medium)
CWE
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/mariadb-corporation/mariadb-co… | x_refsource_CONFIRM |
| https://github.com/mariadb-corporation/mariadb-co… | x_refsource_MISC |
| https://hackerone.com/reports/3784556 | x_refsource_MISC |
| https://github.com/mariadb-corporation/mariadb-co… | x_refsource_MISC |
| https://jira.mariadb.org/browse/R2DBC-115 | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| mariadb-corporation | mariadb-connector-r2dbc |
Affected:
< 1.4.1
|
|
| org.mariadb | r2dbc-mariadb |
Affected:
< 1.4.1
|
{
"containers": {
"cna": {
"affected": [
{
"product": "mariadb-connector-r2dbc",
"vendor": "mariadb-corporation",
"versions": [
{
"status": "affected",
"version": "\u003c 1.4.1"
}
]
},
{
"product": "r2dbc-mariadb",
"vendor": "org.mariadb",
"versions": [
{
"status": "affected",
"version": "\u003c 1.4.1"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "MariaDB Connector/R2DBC is a non-blocking MariaDB and MySQL client implemented in Java. Prior to 1.4.1, org.mariadb:r2dbc-mariadb does not gate clear-text password authentication plugins on transport encryption because the AuthenticationPlugin interface has no capability for a plugin to require a secure connection. A hostile or man-in-the-middle MariaDB server can send an AuthSwitchRequest naming mysql_clear_password or dialog (PAM) over a plain-TCP unencrypted connection, and AuthenticationFlow permits ClearPasswordPluginFlow or PamPluginFlow to return the user\u0027s password as cleartext bytes on the wire. The disclosed credentials can subsequently be used to authenticate directly to the database server. This issue is fixed in version 1.4.1."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.9,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-319",
"description": "CWE-319: Cleartext Transmission of Sensitive Information",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-522",
"description": "CWE-522: Insufficiently Protected Credentials",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-28T22:50:30.896Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/mariadb-corporation/mariadb-connector-r2dbc/security/advisories/GHSA-c857-9x2m-cvh2",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/mariadb-corporation/mariadb-connector-r2dbc/security/advisories/GHSA-c857-9x2m-cvh2"
},
{
"name": "https://github.com/mariadb-corporation/mariadb-connector-r2dbc/commit/be786603ec5530414996d2396157013e095b320a",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/mariadb-corporation/mariadb-connector-r2dbc/commit/be786603ec5530414996d2396157013e095b320a"
},
{
"name": "https://hackerone.com/reports/3784556",
"tags": [
"x_refsource_MISC"
],
"url": "https://hackerone.com/reports/3784556"
},
{
"name": "https://github.com/mariadb-corporation/mariadb-connector-r2dbc/releases/tag/1.4.1",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/mariadb-corporation/mariadb-connector-r2dbc/releases/tag/1.4.1"
},
{
"name": "https://jira.mariadb.org/browse/R2DBC-115",
"tags": [
"x_refsource_MISC"
],
"url": "https://jira.mariadb.org/browse/R2DBC-115"
}
],
"source": {
"advisory": "GHSA-c857-9x2m-cvh2",
"discovery": "UNKNOWN"
},
"title": "MariaDB Connector/R2DBC: Cleartext password disclosure to a man-in-the-middle server (clear-text auth plugins not gated on a secure transport)"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-55860",
"datePublished": "2026-08-28T22:50:30.896Z",
"dateReserved": "2026-06-17T16:44:40.995Z",
"dateUpdated": "2026-08-28T22:50:30.896Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-55859 (GCVE-0-2026-55859)
Vulnerability from nvd – Published: 2026-08-28 22:48 – Updated: 2026-08-28 22:48
VLAI
EPSS
VEX
Title
MariaDB Connector/R2DBC: Inappropriate Encoding for Output Context and Improper Encoding or Escaping of Output in org.mariadb:r2dbc-mariadb
Summary
MariaDB Connector/R2DBC is a non-blocking MariaDB and MySQL client implemented in Java. Prior to 1.4.1, org.mariadb:r2dbc-mariadb encodes and decodes all character data under the assumption that the connection character set is UTF-8. A server can announce a mid-session change to character_set_client through the OK-packet session-state-tracking mechanism, including through SET NAMES executed by a stored routine or trigger, server configuration, or a hostile or man-in-the-middle server. If the new character set is not UTF-8, the driver continues to exchange UTF-8 while the server interprets the same bytes under a different 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 raises R2dbcNonTransientResourceException with SQLState 08000 and closes the connection. This issue is fixed in version 1.4.1.
Severity
5.9 (Medium)
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/mariadb-corporation/mariadb-co… | x_refsource_CONFIRM |
| https://github.com/mariadb-corporation/mariadb-co… | x_refsource_MISC |
| https://github.com/mariadb-corporation/mariadb-co… | x_refsource_MISC |
| https://jira.mariadb.org/browse/R2DBC-124 | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| mariadb-corporation | mariadb-connector-r2dbc |
Affected:
< 1.4.1
|
|
| org.mariadb | r2dbc-mariadb |
Affected:
< 1.4.1
|
{
"containers": {
"cna": {
"affected": [
{
"product": "mariadb-connector-r2dbc",
"vendor": "mariadb-corporation",
"versions": [
{
"status": "affected",
"version": "\u003c 1.4.1"
}
]
},
{
"product": "r2dbc-mariadb",
"vendor": "org.mariadb",
"versions": [
{
"status": "affected",
"version": "\u003c 1.4.1"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "MariaDB Connector/R2DBC is a non-blocking MariaDB and MySQL client implemented in Java. Prior to 1.4.1, org.mariadb:r2dbc-mariadb encodes and decodes all character data under the assumption that the connection character set is UTF-8. A server can announce a mid-session change to character_set_client through the OK-packet session-state-tracking mechanism, including through SET NAMES executed by a stored routine or trigger, server configuration, or a hostile or man-in-the-middle server. If the new character set is not UTF-8, the driver continues to exchange UTF-8 while the server interprets the same bytes under a different 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 raises R2dbcNonTransientResourceException with SQLState 08000 and closes the connection. This issue is fixed in version 1.4.1."
}
],
"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"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-116",
"description": "CWE-116: Improper Encoding or Escaping of Output",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-838",
"description": "CWE-838: Inappropriate Encoding for Output Context",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-28T22:48:41.592Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/mariadb-corporation/mariadb-connector-r2dbc/security/advisories/GHSA-5rqc-86vf-g8r2",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/mariadb-corporation/mariadb-connector-r2dbc/security/advisories/GHSA-5rqc-86vf-g8r2"
},
{
"name": "https://github.com/mariadb-corporation/mariadb-connector-r2dbc/commit/38bad9afebc6c581a853656a42f9ebf403b1b1b7",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/mariadb-corporation/mariadb-connector-r2dbc/commit/38bad9afebc6c581a853656a42f9ebf403b1b1b7"
},
{
"name": "https://github.com/mariadb-corporation/mariadb-connector-r2dbc/releases/tag/1.4.1",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/mariadb-corporation/mariadb-connector-r2dbc/releases/tag/1.4.1"
},
{
"name": "https://jira.mariadb.org/browse/R2DBC-124",
"tags": [
"x_refsource_MISC"
],
"url": "https://jira.mariadb.org/browse/R2DBC-124"
}
],
"source": {
"advisory": "GHSA-5rqc-86vf-g8r2",
"discovery": "UNKNOWN"
},
"title": "MariaDB Connector/R2DBC: Inappropriate Encoding for Output Context and Improper Encoding or Escaping of Output in org.mariadb:r2dbc-mariadb"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-55859",
"datePublished": "2026-08-28T22:48:41.592Z",
"dateReserved": "2026-06-17T16:44:40.995Z",
"dateUpdated": "2026-08-28T22:48:41.592Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-55860 (GCVE-0-2026-55860)
Vulnerability from cvelistv5 – Published: 2026-08-28 22:50 – Updated: 2026-08-28 22:50
VLAI
EPSS
VEX
Title
MariaDB Connector/R2DBC: Cleartext password disclosure to a man-in-the-middle server (clear-text auth plugins not gated on a secure transport)
Summary
MariaDB Connector/R2DBC is a non-blocking MariaDB and MySQL client implemented in Java. Prior to 1.4.1, org.mariadb:r2dbc-mariadb does not gate clear-text password authentication plugins on transport encryption because the AuthenticationPlugin interface has no capability for a plugin to require a secure connection. A hostile or man-in-the-middle MariaDB server can send an AuthSwitchRequest naming mysql_clear_password or dialog (PAM) over a plain-TCP unencrypted connection, and AuthenticationFlow permits ClearPasswordPluginFlow or PamPluginFlow to return the user's password as cleartext bytes on the wire. The disclosed credentials can subsequently be used to authenticate directly to the database server. This issue is fixed in version 1.4.1.
Severity
5.9 (Medium)
CWE
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/mariadb-corporation/mariadb-co… | x_refsource_CONFIRM |
| https://github.com/mariadb-corporation/mariadb-co… | x_refsource_MISC |
| https://hackerone.com/reports/3784556 | x_refsource_MISC |
| https://github.com/mariadb-corporation/mariadb-co… | x_refsource_MISC |
| https://jira.mariadb.org/browse/R2DBC-115 | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| mariadb-corporation | mariadb-connector-r2dbc |
Affected:
< 1.4.1
|
|
| org.mariadb | r2dbc-mariadb |
Affected:
< 1.4.1
|
{
"containers": {
"cna": {
"affected": [
{
"product": "mariadb-connector-r2dbc",
"vendor": "mariadb-corporation",
"versions": [
{
"status": "affected",
"version": "\u003c 1.4.1"
}
]
},
{
"product": "r2dbc-mariadb",
"vendor": "org.mariadb",
"versions": [
{
"status": "affected",
"version": "\u003c 1.4.1"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "MariaDB Connector/R2DBC is a non-blocking MariaDB and MySQL client implemented in Java. Prior to 1.4.1, org.mariadb:r2dbc-mariadb does not gate clear-text password authentication plugins on transport encryption because the AuthenticationPlugin interface has no capability for a plugin to require a secure connection. A hostile or man-in-the-middle MariaDB server can send an AuthSwitchRequest naming mysql_clear_password or dialog (PAM) over a plain-TCP unencrypted connection, and AuthenticationFlow permits ClearPasswordPluginFlow or PamPluginFlow to return the user\u0027s password as cleartext bytes on the wire. The disclosed credentials can subsequently be used to authenticate directly to the database server. This issue is fixed in version 1.4.1."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.9,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-319",
"description": "CWE-319: Cleartext Transmission of Sensitive Information",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-522",
"description": "CWE-522: Insufficiently Protected Credentials",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-28T22:50:30.896Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/mariadb-corporation/mariadb-connector-r2dbc/security/advisories/GHSA-c857-9x2m-cvh2",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/mariadb-corporation/mariadb-connector-r2dbc/security/advisories/GHSA-c857-9x2m-cvh2"
},
{
"name": "https://github.com/mariadb-corporation/mariadb-connector-r2dbc/commit/be786603ec5530414996d2396157013e095b320a",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/mariadb-corporation/mariadb-connector-r2dbc/commit/be786603ec5530414996d2396157013e095b320a"
},
{
"name": "https://hackerone.com/reports/3784556",
"tags": [
"x_refsource_MISC"
],
"url": "https://hackerone.com/reports/3784556"
},
{
"name": "https://github.com/mariadb-corporation/mariadb-connector-r2dbc/releases/tag/1.4.1",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/mariadb-corporation/mariadb-connector-r2dbc/releases/tag/1.4.1"
},
{
"name": "https://jira.mariadb.org/browse/R2DBC-115",
"tags": [
"x_refsource_MISC"
],
"url": "https://jira.mariadb.org/browse/R2DBC-115"
}
],
"source": {
"advisory": "GHSA-c857-9x2m-cvh2",
"discovery": "UNKNOWN"
},
"title": "MariaDB Connector/R2DBC: Cleartext password disclosure to a man-in-the-middle server (clear-text auth plugins not gated on a secure transport)"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-55860",
"datePublished": "2026-08-28T22:50:30.896Z",
"dateReserved": "2026-06-17T16:44:40.995Z",
"dateUpdated": "2026-08-28T22:50:30.896Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-55859 (GCVE-0-2026-55859)
Vulnerability from cvelistv5 – Published: 2026-08-28 22:48 – Updated: 2026-08-28 22:48
VLAI
EPSS
VEX
Title
MariaDB Connector/R2DBC: Inappropriate Encoding for Output Context and Improper Encoding or Escaping of Output in org.mariadb:r2dbc-mariadb
Summary
MariaDB Connector/R2DBC is a non-blocking MariaDB and MySQL client implemented in Java. Prior to 1.4.1, org.mariadb:r2dbc-mariadb encodes and decodes all character data under the assumption that the connection character set is UTF-8. A server can announce a mid-session change to character_set_client through the OK-packet session-state-tracking mechanism, including through SET NAMES executed by a stored routine or trigger, server configuration, or a hostile or man-in-the-middle server. If the new character set is not UTF-8, the driver continues to exchange UTF-8 while the server interprets the same bytes under a different 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 raises R2dbcNonTransientResourceException with SQLState 08000 and closes the connection. This issue is fixed in version 1.4.1.
Severity
5.9 (Medium)
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/mariadb-corporation/mariadb-co… | x_refsource_CONFIRM |
| https://github.com/mariadb-corporation/mariadb-co… | x_refsource_MISC |
| https://github.com/mariadb-corporation/mariadb-co… | x_refsource_MISC |
| https://jira.mariadb.org/browse/R2DBC-124 | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| mariadb-corporation | mariadb-connector-r2dbc |
Affected:
< 1.4.1
|
|
| org.mariadb | r2dbc-mariadb |
Affected:
< 1.4.1
|
{
"containers": {
"cna": {
"affected": [
{
"product": "mariadb-connector-r2dbc",
"vendor": "mariadb-corporation",
"versions": [
{
"status": "affected",
"version": "\u003c 1.4.1"
}
]
},
{
"product": "r2dbc-mariadb",
"vendor": "org.mariadb",
"versions": [
{
"status": "affected",
"version": "\u003c 1.4.1"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "MariaDB Connector/R2DBC is a non-blocking MariaDB and MySQL client implemented in Java. Prior to 1.4.1, org.mariadb:r2dbc-mariadb encodes and decodes all character data under the assumption that the connection character set is UTF-8. A server can announce a mid-session change to character_set_client through the OK-packet session-state-tracking mechanism, including through SET NAMES executed by a stored routine or trigger, server configuration, or a hostile or man-in-the-middle server. If the new character set is not UTF-8, the driver continues to exchange UTF-8 while the server interprets the same bytes under a different 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 raises R2dbcNonTransientResourceException with SQLState 08000 and closes the connection. This issue is fixed in version 1.4.1."
}
],
"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"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-116",
"description": "CWE-116: Improper Encoding or Escaping of Output",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-838",
"description": "CWE-838: Inappropriate Encoding for Output Context",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
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