CVE-2026-72749 n8n before 1.123.67 Prototype Pollution via Edit Fields
An authenticated user can cause instance-wide denial of service in n8n by exploiting prototype pollution in the Edit Fields node.
- 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-2026-72749?
CVE-2026-72749 is a high-severity vulnerability in N8n N8n, published on 11 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
n8n before 1.123.67, 2.31.5, and 2.32.1 contains a prototype pollution vulnerability in the Edit Fields (Set) node. The node assigns output fields via a dot-notation path setter without restricting the field name, allowing an authenticated user to name a field after an inherited built-in method path and corrupt a shared global in the main Node.js process. Because that global is used on the request-authentication path, the instance then fails every authenticated request, causing an instance-wide denial of service for all users until the process is restarted.
Weakness: CWE-1321
Which versions are affected by CVE-2026-72749?
6 open source packages ship an affected version, including n8n. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
n8n npm | All versions | 1.123.67 |
n8n npm | All versions | 1.123.67 |
n8n npm | From 2.0.0-rc.0 | 2.31.5 |
n8n npm | From 2.0.0-rc.0 | 2.31.5 |
n8n npm | From 2.32.0 | 2.32.1 |
n8n npm | From 2.32.0 | 2.32.1 |
Products include N8n N8n.
How do I fix CVE-2026-72749?
Upgrade n8n to a fixed version for your release line: 1.123.67, 2.31.5 or 2.32.1.
Is CVE-2026-72749 being exploited?
There is no known exploitation of CVE-2026-72749 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-vg34-hpfq-m5qm, GHSA-xwx6-jjhv-84p8, MINI-mjj2-p263-624j, MINI-qw7v-jh7c-6gm8, ROOT-APP-NPM-GHSA-xwx6-jjhv-84p8.