Vulnerability Intelligence Report
n8n Vulnerable to Unauthenticated File Access via Improper Webhook Request Handling
CVE-2026-21858
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.
Nuclei Template
CVSS Base Score
10.0
CRITICAL
Exploitability:3.9
Impact Score:5.8
EPSS Probability:71.65%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-20 ↗CWE-20: Improper Input Validation
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| n8n-io | n8n | >= 1.65.0, < 1.121.0 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | GitHub, Inc. · Vendor · USA |
| Reserved | 2026-01-05T16:44:16 |
| Published | 2026-01-07T23:57:52 |
| Last Updated | 2026-01-12T18:37:27 |
Community Chatter & Buzz