CVE-2026-21858NVD

Vulnerability 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.

Severity Level

CRITICAL(10.0)

Published Date

Jan 8, 2026

Last Modified

Jan 16, 2026

PoC

Available(Nuclei)

Exploitation Status

No confirmed exploitation yet

EPSS Score (30-Day)

Data Pending

Root Weakness (CWE)

CWE-20: Improper Input Validation ↗

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required.

CVSS v3.1 Base Metrics — Score 10.0 (CRITICAL)

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeChanged

ConfidentialityHigh

IntegrityHigh

AvailabilityNone

Affected & Patched Versions

Affected Versions

N8n N8n >= 1.65.0 and < 1.121.0

Patched Versions

N8n N8n 1.121.0

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