GitHub Advisoryadvisory · npm

GHSA-x6p3-m6h9-fx7r n8n: Microsoft SQL Node Prototype Pollution

HIGH Published 2026-06-16 Modified 2026-07-20 Official page ↗
Aliases
CVE-2026-54312
Ecosystem
npm
Packages
n8n
Severity
High
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:H
Weaknesses
CWE-1321
Reviewed
2026-06-16

Affected packages

• npm n8n: < 2.24.0 → fixed in 2.24.0

Description

Impact An authenticated user with permission to create or modify workflows could achieve global prototype pollution via the Microsoft SQL node by supplying a crafted value as the table parameter. This pollutes `Object.prototype` process-wide for the lifetime of the n8n server process, causing application-wide validation failures and rendering the n8n instance completely non-functional until restarted. Patches The issue has been fixed in n8n version 2.24.0. Users should upgrade to this version or later to remediate the vulnerability. Workarounds If upgrading is not immediately possible, administrators should consider the following temporary mitigations: • Limit workflow creation and editing permissions to fully trusted users only. • Disable the Microsoft SQL node by adding `n8n-nodes-base.microsoftSql` to the `NODES_EXCLUDE` environment variable. These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.

Related

Alias · CVE (1)

  • CVE-2026-54312 n8n is an open source workflow automation platform. vulnerability

Weakness · CWE (1)

  • CWE-1321 Improperly Controlled Modification of Object Prototype Attributes weakness

References