MariaDB Connector/J: Cleartext Transmission of Sensitive Information and Insufficiently Protected Credentials

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-55857
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-28 23:17:08 UTC
Updated2026-08-28 23:17:08 UTC
DescriptionMariaDB 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, PAM dialog authentication can be coerced into transmitting the account password over an insecure connection. The mysql_clear_password plugin is gated behind a secure transport, but the sibling PAM handler SendPamAuthPacketFactory, named dialog by the server, does not declare that requirement and inherits the default secure-required value false; older branches implement the same affected behavior in SendPamAuthPacket. A hostile or man-in-the-middle server can send an Authentication Switch Request for dialog over plain TCP, causing the driver to return the user's password in cleartext when sslMode=DISABLE and restrictedAuth=null, which is the default configuration. Properly verified TLS and local Unix sockets are not exposed to this transport vector. This issue is fixed in versions 2.7.14, 3.3.5, 3.4.3, and 3.5.9.

Risk And Classification

Primary CVSS: v3.1 5.9 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Problem Types: CWE-319 | CWE-522 | CWE-319 CWE-319: Cleartext Transmission of Sensitive Information | CWE-522 CWE-522: Insufficiently Protected Credentials

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.9MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
3.1CNADECLARED5.9MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Mariadb-corporation Mariadb-connector-j affected < 2.7.14 Not specified
CNA Mariadb-corporation Mariadb-connector-j affected >= 3.0.0, < 3.3.5 Not specified
CNA Mariadb-corporation Mariadb-connector-j affected >= 3.4.0, < 3.4.3 Not specified
CNA Mariadb-corporation Mariadb-connector-j affected >= 3.5.0, < 3.5.9 Not specified

References

ReferenceSourceLinkTags
github.com/mariadb-corporation/mariadb-connector-j/releases/tag/3.4.3 [email protected] github.com
github.com/mariadb-corporation/mariadb-connector-j/commit/f4a727c764d1cf... [email protected] github.com
github.com/mariadb-corporation/mariadb-connector-j/commit/a8599ab1cbe4b8... [email protected] github.com
github.com/mariadb-corporation/mariadb-connector-j/releases/tag/3.5.9 [email protected] github.com
jira.mariadb.org/browse/CONJ-1320 [email protected] jira.mariadb.org
github.com/mariadb-corporation/mariadb-connector-j/security/advisories/G... [email protected] github.com
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