GitHub Advisoryadvisory · npm

GHSA-v4pr-fm98-w9pg n8n Vulnerable to Unauthenticated File Access via Improper Webhook Request Handling

CRITICAL Published 2026-01-07 Modified 2026-01-13 Official page ↗
Aliases
CVE-2026-21858
Ecosystem
npm
Packages
n8n
Severity
Critical
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
Weaknesses
CWE-20
Reviewed
2026-01-07

Affected packages

• npm n8n: >= 1.65.0, < 1.121.0 → fixed in 1.121.0

Description

Impact A vulnerability in n8n allows 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. This could result in exposure of sensitive information stored on the system and may enable further compromise depending on deployment configuration and workflow usage. Patches The issue has been fixed in n8n version 1.121.0. Users should upgrade to this version or later to remediate the vulnerability. Workarounds No official workarounds are available. As a temporary mitigation, users may restrict or disable publicly accessible webhook and form endpoints until upgrading.

Related

Alias · CVE (1)

  • CVE-2026-21858 n8n is an open source workflow automation platform. vulnerability

Weakness · CWE (1)

  • CWE-20 Improper Input Validation weakness

References