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CVE-2026-55857: CWE-319: Cleartext Transmission of Sensitive Information in mariadb-corporation mariadb-connector-j

0
Medium
VulnerabilityCVE-2026-55857cvecve-2026-55857cwe-319cwe-522
Published: 08/28/2026 (08/28/2026, 22:44:24 UTC)
Source: CVE Database V5
Vendor/Project: mariadb-corporation
Product: mariadb-connector-j

Description

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, 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.

CVSS v3.1

Score 5.9medium

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

Technical Details

Data Version
5.2
Assigner Short Name
GitHub_M
Date Reserved
2026-06-17T16:44:40.995Z
Cvss Version
3.1
State
PUBLISHED
Remediation Level
null

Threat ID: 6a92113dacd9273b496f46a9

Added to database: 08/28/2026, 22:52:45 UTC

Last updated: 08/29/2026, 00:37:23 UTC

Views: 7

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