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CVE-2026-27495— n8n has a Sandbox Escape in its JavaScript Task Runner

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之前版本存在代码注入漏洞，该漏洞源于JavaScript Task Runner沙箱存在缺陷，可能导致具有工作流创建或修改权限的经过身份验证的用户在沙箱边界外执行任意代码。

AI Predicted 8.8 Difficulty: Easy EPSS 0.82% · P56
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I. Basic Information for CVE-2026-27495

Vulnerability Information
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Vulnerability Title
n8n has a Sandbox Escape in its JavaScript Task Runner
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 exploit a vulnerability in the JavaScript Task Runner sandbox to execute arbitrary code outside the sandbox boundary. On instances using internal Task Runners (default runner mode), this could result in full compromise of the n8n host. On instances using external Task Runners, the attacker might gain access to or impact other task executed on the Task Runner. Task Runners must be enabled using `N8N_RUNNERS_ENABLED=true`. The issue has been fixed in n8n versions 2.10.1, 2.9.3, and 1.123.22. 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 use external runner mode (`N8N_RUNNERS_MODE=external`) to limit the blast radius. 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:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Source: CVE Program / CVE List V5
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: CVE Program / CVE List V5
Vulnerability Title
n8n 代码注入漏洞
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之前版本存在代码注入漏洞，该漏洞源于JavaScript Task Runner沙箱存在缺陷，可能导致具有工作流创建或修改权限的经过身份验证的用户在沙箱边界外执行任意代码。
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-2026-27495

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III. Intelligence Information for CVE-2026-27495

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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-2026-27493 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-2026-27578 n8n Vulnerable to Stored XSS via Various Nodes
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-94

V. Comments for CVE-2026-27495

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