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CVE-2026-42227— n8n: Public API Variables IDOR Allows Cross-Project Secret Disclosure

AI Predicted 6.5 Difficulty: Easy EPSS 0.03% · P10

Affected Version Matrix 3

VendorProductVersion RangeStatus
n8n-ion8n< 1.123.32affected
>= 2.17.0, < 2.17.4affected
>= 2.18.0, < 2.18.1affected
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I. Basic Information for CVE-2026-42227

Vulnerability Information
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Vulnerability Title
n8n: Public API Variables IDOR Allows Cross-Project Secret Disclosure
Source: NVD (National Vulnerability Database)
Vulnerability Description
n8n is an open source workflow automation platform. Prior to versions 1.123.32, 2.17.4, and 2.18.1, an authenticated user with a valid API key scoped to variable:list could read variables from projects they are not a member of by supplying an arbitrary projectId query parameter to the public API variables endpoint. The handler queried the variables repository directly without enforcing project membership checks, bypassing the authorization-aware service layer used by the internal enterprise controller. If variables were misused to store sensitive information such as credentials or tokens, they should be rotated immediately. This issue only affects licensed enterprise or team deployments with multiple projects and the variables feature enabled. This issue has been patched in versions 1.123.32, 2.17.4, and 2.18.1.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: NVD (National Vulnerability Database)
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 1.123.32之前版本、2.17.4之前版本和2.18.1之前版本存在安全漏洞，该漏洞源于公共API变量端点未强制执行项目成员检查，可能导致具有有效API密钥的认证用户读取非成员项目的变量。
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

VendorProductAffected VersionsCPESubscribe
n8n-ion8n < 1.123.32 -

II. Public POCs for CVE-2026-42227

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III. Intelligence Information for CVE-2026-42227

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Vendor Advisories for CVE-2026-42227 (1)

Same Patch Batch · n8n-io · 2026-05-04 · 12 CVEs total

CVE-2026-42232n8n: XML Node Prototype Pollution to RCE
CVE-2026-42233n8n: SQL Injection in Oracle Database Node via Limit Field
CVE-2026-42229n8n: SQL Injection in SeaTable Node
CVE-2026-42228n8n: Hijacking of Unauthenticated Chat Execution
CVE-2026-42235n8n: XSS via MCP OAuth client
CVE-2026-42236n8n: Unauthenticated Denial of Service via MCP Client Registration
CVE-2026-42237n8n: SQL Injection in Snowflake and MySQL Nodes
CVE-2026-42226n8n: Credential Authorization Bypass in dynamic-node-parameters Allows Foreign API Key Rep
CVE-2026-42230n8n: Open Redirect in MCP OAuth Consent Flow
CVE-2026-42234n8n: Python Task Runner Sandbox Escape
CVE-2026-42231n8n: Prototype Pollution in XML Webhook Body Parser Leads to RCE

IV. Related Vulnerabilities

Same product: n8n
Same vendor: n8n-io
Same weakness: CWE-639

V. Comments for CVE-2026-42227

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