n8n Node.js Package 1.65.0 < 1.121.0 Improper Access Control (Ni8Mare)

critical Nessus Plugin ID 282598

Synopsis

The n8n Node.js Package installed on the remote host is affected by an improper access control vulnerability.

Description

The version of the n8n Node.js Package installed on the remote host is prior to 1.121.0. It is, therefore, affected by an improper access control vulnerability:

- 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.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Upgrade to n8n Node.js Package version 1.121.0 or later.

Plugin Details

Severity: Critical

ID: 282598

File Name: n8n_nodejs_package_1_121_0.nasl

Version: 1.1

Type: local

Agent: windows, macosx, unix

Family: Misc.

Published: 1/12/2026

Updated: 1/12/2026

Configuration: Enable thorough checks (optional)

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Critical

Score: 9.9

CVSS v2

Risk Factor: High

Base Score: 9.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:N

CVSS Score Source: CVE-2026-21858

CVSS v3

Risk Factor: Critical

Base Score: 10

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N

Vulnerability Information

CPE: cpe:/a:nodejs:node.js

Required KB Items: Host/nodejs/modules/enumerated

Patch Publication Date: 11/18/2025

Vulnerability Publication Date: 1/7/2026

Reference Information

CVE: CVE-2026-21858

CWE: 20

Detections

Analytics