---
id: CVE-2026-55215
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 versions 3.3.3, 3.4.6, and 3.5.3,
  when ssl is enabled without a pinned CA or server certificate, MariaDB
  Connector/No…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-295
  - 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-2026-55215'
references:
  - url: >-
      https://github.com/mariadb-corporation/mariadb-connector-nodejs/commit/514576a5a1fab3ea8498613e259a0b7a764e7302
    label: security-advisories@github.com
  - url: >-
      https://github.com/mariadb-corporation/mariadb-connector-nodejs/commit/c47d7275835c78c7eb8186cd23e9d57c045c128b
    label: security-advisories@github.com
  - url: >-
      https://github.com/mariadb-corporation/mariadb-connector-nodejs/commit/ecd36958e6e3bf0e0fa8389546f50c0ed6dbb2ac
    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-cqhc-2h57-wpxf
    label: security-advisories@github.com
  - url: 'https://hackerone.com/reports/3777370'
    label: security-advisories@github.com
  - url: 'https://jira.mariadb.org/browse/CONJS-349'
    label: security-advisories@github.com
  - url: 'https://github.com/advisories/GHSA-cqhc-2h57-wpxf'
tags:
  - nvd
  - ghsa
  - npm
epss: 0.00569
epssPercentile: 0.44802
aliases:
  - GHSA-cqhc-2h57-wpxf
ecosystem: npm
ingestedAt: '2026-08-28T19:24:18.945Z'
---

## Overview

MariaDB Connector/Node.js is used to connect applications developed on Node.js to MariaDB and MySQL databases. Prior to versions 3.3.3, 3.4.6, and 3.5.3, when ssl is enabled without a pinned CA or server certificate, MariaDB Connector/Node.js sends credentials before completing certificate fingerprint validation. In lib/cmd/handshake/auth/handshake.js, a server that selects mysql_clear_password as the initial authentication plugin can receive the password before the post-TLS identity check. In lib/cmd/handshake/authentication.js, an authentication switch can evaluate the previous plugin instead of the requested target plugin, allowing mysql_clear_password to send the credential first. An active man-in-the-middle can present a self-signed certificate, capture the database password, and use it to authenticate directly even though the connector later rejects the server and closes the connection. This issue is fixed in versions 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-2026-55215)

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-cqhc-2h57-wpxf