CVE-2026-27578: n8n Vulnerable to Stored XSS via Various Nodes
Summary
CVE-2026-27578: n8n Vulnerable to Stored XSS via Various Nodes. Affects n8n across 3 version ranges.
< 1.123.22
>= 2.0.0, < 2.9.3
>= 2.10.0, < 2.10.1
Fixed in 1.123.22, 2.9.3 or 2.10.1, depending on the release line you run. How to fix ↓
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Background
n8n is an open-source workflow automation tool that allows users to connect various applications and services to automate tasks. It features a visual interface for creating workflows, supports numerous integrations, and is designed for both technical and non-technical users. However, it has a vulnerability that allows authenticated users to inject malicious scripts into workflows, posing a significant security risk.
Vulnerability Detail
The vulnerability arises from the ability of authenticated users with permissions to create or modify workflows to inject arbitrary scripts into pages rendered by the n8n application. This can be done through various nodes, including the Form Trigger node, Chat Trigger node, Send & Wait node, Webhook Node, and Chat Node. The injected scripts execute in the browsers of users who visit the affected pages, leading to potential session hijacking and account takeover.
How To Fix
Latest published version: 2.44.6 as of 22 Oct 2026
npm install n8n@2.44.6Upgrading to it may include breaking changes; the versions below are the minimum fixed release for this vulnerability.
If you can't move to the latest
The minimum fixed version depends on the release line you run.
-
< 1.123.221.123.22npm install n8n@1.123.22 -
>= 2.0.0, < 2.9.32.9.3npm install n8n@2.9.3 -
>= 2.10.0, < 2.10.12.10.1npm install n8n@2.10.1
Tip — Not sure which release line you're on? Vulert can find the fix for the version you are using. Scan free →
Workaround
If immediate upgrading is not feasible, administrators can implement temporary mitigations such as limiting workflow creation and editing permissions to trusted users only. Additionally, the Webhook node can be disabled by adding 'n8n-nodes-base.webhook' to the NODES_EXCLUDE environment variable.
Conclusion
The n8n application has a critical vulnerability that allows for stored XSS attacks via various nodes. Users are strongly encouraged to upgrade to the latest patched versions to mitigate this risk. Temporary workarounds can be employed while planning for an upgrade.
See every vulnerability recorded for n8n →
FAQ
The vulnerability allows authenticated users to inject malicious scripts into n8n workflows, which can then execute in the browsers of other users.
You can use Vulert's playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
The consequences include session hijacking and account takeover, which can lead to unauthorized access to sensitive information and workflows.
If you cannot upgrade, limit workflow permissions to trusted users and consider disabling the Webhook node as temporary mitigations.
The CVSS score of this vulnerability is 5.4, indicating a moderate level of risk.
References
Related vulnerabilities
Recent vulnerabilities recorded for n8n.
