CVE-2026-21858

moderate-risk
Published 2026-01-08

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.

Do I need to act?

~
5.8% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
+
Fix available
Upgrade to: faae32934230ca3f0a7da1798e6737c3891ef250
10
CVSS 10.0/10 Critical
NETWORK / LOW complexity

Affected Products (1)

N8N

Affected Vendors

N8N

References (2)

Vendor Advisory https://github.com/n8n-io/n8n/security/advisories/GHSA-v4pr-fm98-w9pg
Exploit https://www.cyera.com/research-labs/ni8mare-unauthenticated-remote-code-executio...
47
/ 100
moderate-risk
Severity 33/34 · Critical
Exploitability 9/34 · Low
Exposure 5/34 · Minimal