TI-2026-17578 Aliases CVE-2026-21877 GHSA-v364-rw7m-3263

n8n is vulnerable to Remote Code Execution via Arbitrary File Write

MEDIUM 51CWE-434Published 2026-01-08 · Updated 2026-01-08

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-434.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.05449 92nd percentileScored 2026-11-07

Fix Fixed n8n (n8n-io): 1.121.3n8n (npm): 1.121.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
n8n	n8n	before 1.121.3	1.121.3	Patch available	CNA
—	n8n (npm)	0.123.0 to before 1.121.3	1.121.3	Patch available	GHSA-v364-rw7m-3263

n8n Vendorn8n Affected before 1.121.3 Fixed in 1.121.3 Patch available CNA
n8n (npm) Vendor— Affected 0.123.0 to before 1.121.3 Fixed in 1.121.3 Patch available GHSA-v364-rw7m-3263

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:n8n:n8n::::::node.js::*	0.123.0 to before 1.121.3	Vulnerable	n8n

cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:* Versions 0.123.0 to before 1.121.3 Vulnerable ·n8n

Remediation

Fix · CNA n8n (n8n-io) Fixed in 1.121.3
Fix · GHSA-v364-rw7m-3263 n8n (npm) Fixed in 1.121.3 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-21877
2026-10-03 Alias added: GHSA-v364-rw7m-3263

References

TI-2025-42131 n8n Vulnerable to Remote Code Execution via Expression Injection KEVCVSS 3.1CRITICAL 10.0
TI-2026-17560 n8n Vulnerable to Unauthenticated File Access via Improper Webhook Request Handling CVSS 3.1CRITICAL 10.0
TI-2026-01167 Authenticated users can bypass the Expression sandbox mechanism to achieve full remote… CVSS 3.1CRITICAL 9.9
TI-2026-00644 Sandbox escape in n8n Python task runner allows for arbitrary code execution on the underlying host. CVSS 3.1CRITICAL 9.9
TI-2025-35293 An arbitrary file upload vulnerability in the Chat Trigger component of N8N v1.95.3… CVSS 3.1HIGH 8.8
TI-2023-12275 The n8n package 0.218.0 for Node.js allows Escalation of Privileges. CVSS 3.1HIGH 8.8

See all 178 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences