Vulnerability Intelligence Report
n8n is vulnerable to Remote Code Execution via Arbitrary File Write
CVE-2026-21877
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.
Nuclei Template
CVSS Base Score
10.0
CRITICAL
Exploitability:3.2
Impact Score:6.1
EPSS Probability:5.26%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
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Authentication
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Weaponization
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SSVC Action
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Weaknesses (CWE)
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| n8n-io | n8n | < 1.121.3 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | GitHub, Inc. · Vendor · USA |
| Reserved | 2026-01-05T17:24:36 |
| Published | 2026-01-08T00:39:58 |
| Last Updated | 2026-01-08T18:59:10 |
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