CVE-2026-21877

high-risk
Published 2026-01-08

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.

Do I need to act?

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14.1% chance of exploitation in next 30 days
EPSS score — higher than 86% of all CVEs
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
+
Fix available
Upgrade to: 1d9b00907739a39d3df7e89feffb455e9a920e4e
9
CVSS 9.9/10 Critical
NETWORK / LOW complexity

Affected Products (1)

N8N

Affected Vendors

N8N

References (2)

Patch https://github.com/n8n-io/n8n/commit/f4b009d00d1f4ba9359b8e8f1c071e3d910a55f6
Vendor Advisory https://github.com/n8n-io/n8n/security/advisories/GHSA-v364-rw7m-3263
50
/ 100
high-risk
Severity 33/34 · Critical
Exploitability 12/34 · Low
Exposure 5/34 · Minimal