CVE-2026-59206
High
Description
n8n is an open source workflow automation platform. Prior to 1.123.61, 2.27.4, and, 2.28.1, an authenticated user with the default workflow:create permission could pollute Object.prototype through a crafted workflow saved, updated, or imported via the workflow API, allowing unauthenticated requests to be treated as a privileged user and exposing user and project listing endpoints. This issue is fixed in versions 1.123.61, 2.27.4, and 2.28.1.
SeverityHigh
CVSS7.1
Exploit probability—
Product
N8n
PublishedJul 9, 2026
First seenJul 9, 2026
Weakness typeCWE-1321Prototype pollution
How to fix
Update
- n8n n8n1.123.61, 2.27.4 or later
- n8n1.123.61, 2.28.1, 2.27.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| n8n n8n | v < 1.123.61, 2.0.0 ≤ v < 2.27.4, 2.28.0 | 1.123.61, 2.27.4 |
| n8nnpm | v < 1.123.61, 2.28.0 ≤ v < 2.28.1, 2.0.0-rc.0 ≤ v < 2.27.4 | 1.123.61, 2.28.1, 2.27.4 |
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