n8n: Microsoft SQL Node Prototype Pollution
- Product
- n8n
- CVE
- CVE-2026-54312
- Affected
- npm/n8n < 2.24.0
- Fixed in
- 2.24.0
Last verified against sources: October 26, 2026
Am I affected?
n8n: affected npm/n8n < 2.24.0. Fixed in 2.24.0.
- Check your version: run
npm ls n8n. Versions < 2.24.0 of n8n are affected. [1]
What to do now
- Upgrade to the fixed version: run
npm install n8n@2.24.0(first patched version 2.24.0). [1] - Upgrade to n8n version 2.24.0 or later. [1]
- Limit workflow creation and editing permissions to fully trusted users only. [1]
- Disable the Microsoft SQL node by adding
n8n-nodes-base.microsoftSqlto theNODES_EXCLUDEenvironment variable. [1]
General practice, not from the source: if the affected software could read tokens or credentials, rotate them after upgrading; pin versions and review changes before updating tools your agents run.
What happened
- 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. [1]
Impact
- This pollutes
Object.prototypeprocess-wide for the lifetime of the n8n server process, causing application-wide validation failures and rendering the n8n instance completely non-functional until restarted. [1]
What was done
Sources
- GHSA-x6p3-m6h9-fx7r — GitHub Advisory Database
Every statement above was checked against these sources before publishing. Spotted an error? Tell us and we will correct it with a dated note.
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[CVE-2026-54312] n8n: Microsoft SQL Node Prototype Pollution
Product: n8n | Affected: npm/n8n < 2.24.0 | Fixed in: 2.24.0
Summary: 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.
Source & remediation on AgentArmorHQ: https://agentarmorhq.com/incidents/2026/06/cve-2026-54312-n8nCorrections
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