---
id: CVE-2026-55854
title: >-
  MariaDB Connector/Node.js is used to connect applications developed on Node.js
  to MariaDB and MySQL databases
summary: >-
  MariaDB Connector/Node.js is used to connect applications developed on Node.js
  to MariaDB and MySQL databases. Prior to 3.2.4, 3.3.3, 3.4.6, and 3.5.3,
  MariaDB Connector/Node.js can disclose an account password when PAM dialog
  authentica…
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: mariadb
affected:
  - mariadb < 3.2.4
  - 'mariadb >= 3.3.0, < 3.3.3'
  - 'mariadb >= 3.4.0, < 3.4.6'
  - 'mariadb >= 3.5.0, < 3.5.3'
patched:
  - mariadb 3.2.4
  - mariadb 3.3.3
  - mariadb 3.4.6
  - mariadb 3.5.3
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-2026-55854'
references:
  - url: >-
      https://github.com/mariadb-corporation/mariadb-connector-nodejs/commit/29733403cfe6519cdfe9c36c93765a468fbe285d
    label: security-advisories@github.com
  - url: >-
      https://github.com/mariadb-corporation/mariadb-connector-nodejs/commit/53b304264df84496d331dba2765c3634602f342e
    label: security-advisories@github.com
  - url: >-
      https://github.com/mariadb-corporation/mariadb-connector-nodejs/commit/9781de636841d34afdd08d81dd07d43edb82f85c
    label: security-advisories@github.com
  - url: >-
      https://github.com/mariadb-corporation/mariadb-connector-nodejs/commit/fbc159c2c8bd18c2db2d2e6587ab3020bbda64b6
    label: security-advisories@github.com
  - url: >-
      https://github.com/mariadb-corporation/mariadb-connector-nodejs/releases/tag/3.2.4
    label: security-advisories@github.com
  - url: >-
      https://github.com/mariadb-corporation/mariadb-connector-nodejs/releases/tag/3.3.3
    label: security-advisories@github.com
  - url: >-
      https://github.com/mariadb-corporation/mariadb-connector-nodejs/releases/tag/3.4.6
    label: security-advisories@github.com
  - url: >-
      https://github.com/mariadb-corporation/mariadb-connector-nodejs/releases/tag/3.5.3
    label: security-advisories@github.com
  - url: >-
      https://github.com/mariadb-corporation/mariadb-connector-nodejs/security/advisories/GHSA-42r5-vhpq-m858
    label: security-advisories@github.com
  - url: 'https://jira.mariadb.org/browse/CONJS-353'
    label: security-advisories@github.com
  - url: 'https://github.com/advisories/GHSA-42r5-vhpq-m858'
tags:
  - nvd
  - ghsa
  - npm
epss: 0.00417
epssPercentile: 0.33365
aliases:
  - GHSA-42r5-vhpq-m858
ecosystem: npm
ingestedAt: '2026-08-28T22:26:19.160Z'
---

## Overview

MariaDB Connector/Node.js is used to connect applications developed on Node.js to MariaDB and MySQL databases. Prior to 3.2.4, 3.3.3, 3.4.6, and 3.5.3, MariaDB Connector/Node.js can disclose an account password when PAM dialog authentication is negotiated over an insecure transport. In lib/cmd/handshake/auth/pam-password-auth.js and lib/cmd/handshake/authentication.js, the SendPamAuthPacketFactory behavior for the server-side plugin dialog lacked the secure-transport gate applied to mysql_clear_password. With the default sslMode=DISABLE and restrictedAuth=null settings, a hostile or on-path server can send an Authentication Switch Request for dialog over plain TCP, causing the connector to return the account password in cleartext. Properly verified TLS and a local Unix socket prevent this path, while fingerprint-only server identity validation is not sufficient. This issue is fixed in versions 3.2.4, 3.3.3, 3.4.6, and 3.5.3.

## Remediation

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

## Package advisory (CVE-2026-55854)

Affected packages:

- `mariadb < 3.2.4`
- `mariadb >= 3.3.0, < 3.3.3`
- `mariadb >= 3.4.0, < 3.4.6`
- `mariadb >= 3.5.0, < 3.5.3`

Patched in:

- `mariadb 3.2.4`
- `mariadb 3.3.3`
- `mariadb 3.4.6`
- `mariadb 3.5.3`

Source: https://github.com/advisories/GHSA-42r5-vhpq-m858