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Remote Code Execution vulnerability in n8n 

Indian – Computer Emergency Response Team (https://www.cert-in.org.in)

Severity Rating: CRITICAL

Software Affected

n8n Workflow Automation Platform versions prior to 1.121.0

Overview

A critical vulnerability has been reported in n8n Workflow Automation Platform which could be exploited by an unauthenticated attacker to gain unauthorized access, disclose sensitive information and potentially enable further compromise of the targeted system.

Target Audience:

System administrators, DevOps teams and organizations deploying or managing n8n Workflow Automation Platform.

Risk Assessment:

High risk of unauthenticated arbitrary code execution and system compromise.

Impact Assessment:

Potential for sensitive data exposure and unauthorized access.

Description

n8n is an open-source workflow automation platform used to design, execute and manage automated workflows that integrate applications, services and APIs.

A critical vulnerability exists in n8n due to improper handling of webhook request. An attacker can exploit this vulnerability by triggering of certain form-based workflows.

Successful exploitation of this vulnerability could allow an attacker to gain unauthorized access, disclose sensitive information and potentially enable further compromise of the targeted system. 

Solution

Apply appropriate updates as mentioned by the vendor:

https://n8n.io/legal/security/

Vendor Information

n8n Workflow Automation Platform

https://n8n.io/

References

 

https://n8n.io/legal/security/

https://github.com/n8n-io/n8n/security/advisories/GHSA-v4pr-fm98-w9pg

CVE Name

CVE-2026-21858

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Thanks and Regards,

CERT-In

Incident Response Help Desk

e-mail: incident@cert-in.org.in

Phone: +91-11-22902657

Toll Free Number: 1800-11-4949

Toll Free Fax : 1800-11-6969

Web: http://www.cert-in.org.in

PGP Fingerprint: A768 083E 4475 5725 B81A A379 2156 C0C0 B620 D0B4

PGP Key information:

https://www.cert-in.org.in/s2cMainServlet?pageid=CONTACTUS

Postal address:

Indian Computer Emergency Response Team (CERT-In)

Ministry of Electronics and Information Technology

Government of India

Electronics Niketan

6, C.G.O. Complex

New Delhi-110 003

 

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