CVE-2026-21877
Critical
Description
n8n is an open source workflow automation platform. In versions 0.121.2 and below, an authenticated attacker may be able to execute malicious code using the n8n service. This could result in full compromise and can impact both self-hosted and n8n Cloud instances. This issue is fixed in version 1.121.3. Administrators can reduce exposure by disabling the Git node and limiting access for untrusted users, but upgrading to the latest version is recommended.
SeverityCritical
CVSS9.9
Exploit probability—
Product
N8n
PublishedJan 8, 2026
First seenJan 8, 2026
How to fix
Update
- n8n n8n1.121.3 or later
- n8n1.121.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| n8n n8n | 0.123.0 ≤ v < 1.121.3 | 1.121.3 |
| n8nnpm | 0.123.0 ≤ v < 1.121.3 | 1.121.3 |
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