Latest n8n vulnerability: CVE-2026-21858 #

Cyera has reported a vulnerability in the n8n workflow automation tool. This flaw allows a remote, unauthenticated attacker to execute arbitrary code on the vulnerable system. Successful exploitation could allow complete system compromise.

This vulnerability has been assigned CVE-2026-21858 and is rated highly critical has a CVSS score of 10.0.

The following versions are affected

  • n8n versions 1.65.0 up to but not including 1.121.0

What is n8n? #

n8n is an AI-centric workflow automation tool.

What is the impact? #

Successful exploitation of this vulnerability would allow an adversary to execute arbitrary code on the vulnerable host, potentially leading to complete system compromise.

Are updates or workarounds available? #

n8n.io has released version 1.121.0 of n8n. Users are urged to update as quickly as possible.

How to find potentially vulnerable systems with runZero #

From the Services inventory, use the following query to locate potentially vulnerable assets:

_asset.protocol:="http" AND protocol:="http" AND html.title:="n8n.io%"

Written by Rob King

Rob King is the Director of Applied Research at runZero. Over his career Rob has served as a senior researcher with KoreLogic, the architect for TippingPoint DVLabs, and helped get several startups off the ground. Rob helped design SC Magazine's Data Leakage Prevention Product of the Year for 2010, and was awarded the 3Com Innovator of the Year Award in 2009. He has been invited to speak at BlackHat, Shmoocon, SANS Network Security, and USENIX.

More about Rob King
Subscribe Now

Get the latest news and expert insights delivered in your inbox.

Welcome to the club! Your subscription to our newsletter is successful.

Explore more runZero

Product
runZero 5.1 is here: Secure AI workflows, enhanced integrations, and expanded autonomous discovery
runZero 5.1 takes on the heavy lifting across five key areas, enabling you to unmask and remediate exposures with less friction and more speed.
Podcasts
Know Your Adversary with HD Moore
runZero CEO HD Moore breaks down the myth of air-gapped networks, the impact of AI on security, and why asset connectivity is everything.
runZero Perspective
BOD 26-04: A new era of prioritized remediation
A complete breakdown of CISA's BOD 26-04 directive. Learn how the shift to SSVC, risk-based KEV prioritization, and 3-day remediation impacts your...
runZero Perspective
Dawn of the apex agentic adversary
When agentic AI can weaponize exploits in seconds, visibility is everything. Stop the predator with runZero’s exposure management for the AI-attack...
Webcasts
runZero Hour, Ep. 34: Vulnerability vibes: Disclosures, meetups, and the AI evolution
Watch the runZero Hour replay: separating AI "slop" from real vulnerability insights, running local hacker meetups, and analyzing the top monthly...
Product Videos
Custom integrations at AI speed
Build custom exposure management integrations on your terms. runZero 5.1 lets you leverage your choice of AI to create, adapt, and secure your...
Webcasts
runZero Hour, Ep. 33: Hacker Summer Camp: we survived the Vegas heat (and the bugs)
In this post-Hacker Summer Camp recap, the runZero team break down the research, tools, and trends discussed at BSides Las Vegas, Black Hat and DEF...
Podcasts
The Internet's biggest point of failure
Join Tod Beardsley on Secure & Scale as he explores the future of vulnerability management, CVE fragmentation, and how AI is changing security...

See Results in Minutes

See & secure your total attack surface. Even the unknowns & unmanageable.