---
id: CVE-2026-55857
title: >-
  MariaDB Connector/J is used to connect applications developed in Java to
  MariaDB and MySQL databases
summary: >-
  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 insec…
severity: medium
cvss: 5.9
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-319
  - CWE-522
vendor: mariadb
product: 'org.mariadb.jdbc:mariadb-java-client'
affected:
  - 'org.mariadb.jdbc:mariadb-java-client < 2.7.14'
  - 'org.mariadb.jdbc:mariadb-java-client >= 3.0.0, < 3.3.5'
  - 'org.mariadb.jdbc:mariadb-java-client >= 3.4.0, < 3.4.3'
  - 'org.mariadb.jdbc:mariadb-java-client >= 3.5.0, < 3.5.9'
patched:
  - 'org.mariadb.jdbc:mariadb-java-client 2.7.14'
  - 'org.mariadb.jdbc:mariadb-java-client 3.3.5'
  - 'org.mariadb.jdbc:mariadb-java-client 3.4.3'
  - 'org.mariadb.jdbc:mariadb-java-client 3.5.9'
published: '2026-08-28'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T21:08:37.320'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-55857'
references:
  - url: >-
      https://github.com/mariadb-corporation/mariadb-connector-j/commit/a8599ab1cbe4b8818ea945bf56a4e012c302b388
    label: security-advisories@github.com
  - url: >-
      https://github.com/mariadb-corporation/mariadb-connector-j/commit/f4a727c764d1cf48fd0c3d5e301dfa92503e0a58
    label: security-advisories@github.com
  - url: >-
      https://github.com/mariadb-corporation/mariadb-connector-j/releases/tag/3.4.3
    label: security-advisories@github.com
  - url: >-
      https://github.com/mariadb-corporation/mariadb-connector-j/releases/tag/3.5.9
    label: security-advisories@github.com
  - url: >-
      https://github.com/mariadb-corporation/mariadb-connector-j/security/advisories/GHSA-qxvw-fvwx-5cp7
    label: security-advisories@github.com
  - url: 'https://jira.mariadb.org/browse/CONJ-1320'
    label: security-advisories@github.com
  - url: 'https://github.com/advisories/GHSA-qxvw-fvwx-5cp7'
tags:
  - nvd
  - ghsa
  - maven
epss: 0.00197
epssPercentile: 0.09798
aliases:
  - GHSA-qxvw-fvwx-5cp7
ecosystem: maven
ingestedAt: '2026-08-28T23:26:57.394Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-55857)

Affected packages:

- `org.mariadb.jdbc:mariadb-java-client < 2.7.14`
- `org.mariadb.jdbc:mariadb-java-client >= 3.0.0, < 3.3.5`
- `org.mariadb.jdbc:mariadb-java-client >= 3.4.0, < 3.4.3`
- `org.mariadb.jdbc:mariadb-java-client >= 3.5.0, < 3.5.9`

Patched in:

- `org.mariadb.jdbc:mariadb-java-client 2.7.14`
- `org.mariadb.jdbc:mariadb-java-client 3.3.5`
- `org.mariadb.jdbc:mariadb-java-client 3.4.3`
- `org.mariadb.jdbc:mariadb-java-client 3.5.9`

Source: https://github.com/advisories/GHSA-qxvw-fvwx-5cp7