CVE-2026-54312 n8n: Microsoft SQL Node Prototype Pollution
An authenticated user can cause global prototype pollution in n8n via the Microsoft SQL node, leading to a complete denial of service until the server is restarted.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-54312?
CVE-2026-54312 is a high-severity vulnerability in N8n N8n, published on 23 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
n8n is an open source workflow automation platform. Prior to 2.24.0, 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. This vulnerability is fixed in 2.24.0.
Weakness: CWE-1321
Which versions are affected by CVE-2026-54312?
2 open source packages ship an affected version, including n8n. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
n8n npm | All versions | 2.24.0 |
n8n npm | All versions | 2.24.0 |
Products include N8n N8n.
How do I fix CVE-2026-54312?
Upgrade n8n to 2.24.0 or later.
Is CVE-2026-54312 being exploited?
There is no known exploitation of CVE-2026-54312 in the wild and no public exploit code.
Other vulnerabilities in N8n N8n
- CVE-2025-68613 n8n Improper Control of Dynamically-Managed Code Resources
- CVE-2026-21877 n8n is vulnerable to Remote Code Execution via Arbitrary File Write
- CVE-2026-21858 n8n Vulnerable to Unauthenticated File Access via Improper Webhook Request Handling
- CVE-2026-1470 n8n Unsafe Workflow Expression Evaluation Allows Remote Code Execution
- CVE-2025-68668 n8n Vulnerable to Arbitrary Command Execution in Pyodide based Python Code Node
Sources
Also known as GHSA-x6p3-m6h9-fx7r, MINI-wgj6-mwx8-34j8, ROOT-APP-NPM-CVE-2026-54312.