CVE-2026-21858
Critical
Description
n8n is an open source workflow automation platform. Versions starting with 1.65.0 and below 1.121.0 enable an attacker to access files on the underlying server through execution of certain form-based workflows. A vulnerable workflow could grant access to an unauthenticated remote attacker, resulting in exposure of sensitive information stored on the system and may enable further compromise depending on deployment configuration and workflow usage. This issue is fixed in version 1.121.0.
SeverityCritical
CVSS10.0
Exploit probability—
Product
N8n
PublishedJan 8, 2026
First seenJan 8, 2026
Weakness typeCWE-20Improper input validation
How to fix
Update
- n8n n8n1.121.0 or later
- n8n1.121.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| n8n n8n | 1.65.0 ≤ v < 1.121.0 | 1.121.0 |
| n8nnpm | 1.65.0 ≤ v < 1.121.0 | 1.121.0 |
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