TI-2026-17560 Aliases CVE-2026-21858 GHSA-v4pr-fm98-w9pg

n8n Vulnerable to Unauthenticated File Access via Improper Webhook Request Handling

CRITICAL 88CWE-20Published 2026-01-07 · Updated 2026-01-12

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.78188 99th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed n8n (n8n-io): 1.121.0n8n (npm): 1.121.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
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	1.65.0 to before 1.121.0	1.121.0	Patch available	CNA
—	n8n (npm)	1.65.0 to before 1.121.0	1.121.0	Patch available	GHSA-v4pr-fm98-w9pg

n8n Vendorn8n Affected 1.65.0 to before 1.121.0 Fixed in 1.121.0 Patch available CNA
n8n (npm) Vendor— Affected 1.65.0 to before 1.121.0 Fixed in 1.121.0 Patch available GHSA-v4pr-fm98-w9pg

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:n8n:n8n::::::node.js::*	1.65.0 to before 1.121.0	Vulnerable	n8n

cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:* Versions 1.65.0 to before 1.121.0 Vulnerable ·n8n

Remediation

Fix · CNA n8n (n8n-io) Fixed in 1.121.0
Fix · GHSA-v4pr-fm98-w9pg n8n (npm) Fixed in 1.121.0 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-21858
2026-10-03 Alias added: GHSA-v4pr-fm98-w9pg

References

Exploit 1

https://www.cyera.com/research-labs/ni8mare-unauthenticated-remote-code-execution-in-n8n-cve-2026-21858

Advisory 2

Other 1

https://github.com/n8n-io/n8n

TI-2025-42131 n8n Vulnerable to Remote Code Execution via Expression Injection KEVCVSS 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
TI-2023-12276 The n8n package 0.218.0 for Node.js allows Information Disclosure. CVSS 3.1HIGH 7.5

See all 178 →

Sources

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