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CVE-2026-27578— n8n Vulnerable to Stored XSS via Various Nodes

Quick assessment

Affected
n8n-io n8n
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

n8n是n8n开源的一个可扩展的工作流自动化工具。 n8n 2.10.1之前版本、2.9.3之前版本和1.123.22之前版本存在安全漏洞，该漏洞源于具有权限的认证用户可在不同节点上注入任意脚本，可能导致会话劫持和账户接管。

AI Predicted 8.1 Difficulty: Easy EPSS 0.32% · P23
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I. Basic Information for CVE-2026-27578

Vulnerability Information
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Vulnerability Title
n8n Vulnerable to Stored XSS via Various Nodes
Source: CVE Program / CVE List V5
Vulnerability Description
n8n is an open source workflow automation platform. Prior to versions 2.10.1, 2.9.3, and 1.123.22, an authenticated user with permission to create or modify workflows could inject arbitrary scripts into pages rendered by the n8n application using different techniques on various nodes (Form Trigger node, Chat Trigger node, Send & Wait node, Webhook Node, and Chat Node). Scripts injected by a malicious workflow execute in the browser of any user who visits the affected page, enabling session hijacking and account takeover. The issues have been fixed in n8n versions 2.10.1 and 1.123.21. Users should upgrade to one of these versions or later to remediate the vulnerability. If upgrading is not immediately possible, administrators should consider the following temporary mitigations. Limit workflow creation and editing permissions to fully trusted users only, and/or disable the Webhook node by adding `n8n-nodes-base.webhook` to the `NODES_EXCLUDE` environment variable. These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
Web页面中脚本相关HTML标签转义处理不恰当(基本跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
n8n 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
n8n是n8n开源的一个可扩展的工作流自动化工具。 n8n 2.10.1之前版本、2.9.3之前版本和1.123.22之前版本存在安全漏洞，该漏洞源于具有权限的认证用户可在不同节点上注入任意脚本，可能导致会话劫持和账户接管。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
n8n-io n8n < 1.123.22 -

II. Public POCs for CVE-2026-27578

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III. Intelligence Information for CVE-2026-27578

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Patches & Fixes for CVE-2026-27578 (3)

Vendor Advisories for CVE-2026-27578 (1)

Same Patch Batch · n8n-io · 2026-02-25 · 7 CVEs total

CVE-2026-27577 9.4 CRITICAL n8n: Expression Sandbox Escape Leads to RCE
CVE-2026-27495 n8n has a Sandbox Escape in its JavaScript Task Runner
CVE-2026-27493 n8n has Unauthenticated Expression Evaluation via Form Node
CVE-2026-27494 n8n has Arbitrary File Read via Python Code Node Sandbox Escape
CVE-2026-27497 n8n has Potential Remote Code Execution via Merge Node
CVE-2026-27498 n8n has Arbitrary Command Execution via File Write and Git Operations

IV. Related Vulnerabilities

Same product: n8n
Same vendor: n8n-io
Same weakness: CWE-80

V. Comments for CVE-2026-27578

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