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CVE-2026-56359— n8n - Cross-Site Scripting in Credential Management OAuth2 Authorization URL

CVSS 5.4 · Medium EPSS 0.14% · P4

Affected Version Matrix 4

VendorProductVersion RangeStatus
n8nn8n< 2.8.0affected
2.8.0unaffected
< 2.6.4affected
2.6.4unaffected
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I. Basic Information for CVE-2026-56359

Vulnerability Information
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Vulnerability Title
n8n - Cross-Site Scripting in Credential Management OAuth2 Authorization URL
Source: NVD (National Vulnerability Database)
Vulnerability Description
n8n before 2.8.0 contains a cross-site scripting vulnerability in the credential management flow where authenticated users can inject malicious JavaScript URLs into OAuth2 credential Authorization URL fields. Attackers can craft malicious credentials and trick victims into clicking the OAuth authorization button, executing arbitrary scripts in their browser session with the victim's privileges.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: NVD (National Vulnerability Database)
Vulnerability Title
n8n 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
n8n是n8n公司开源的一个可扩展的工作流自动化工具。 n8n 2.8.0之前版本存在跨站脚本漏洞，该漏洞源于在凭据管理流程中，经过身份验证的用户可以向OAuth2凭据授权URL字段注入恶意JavaScript URL，导致容易受到跨站脚本攻击。
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
n8nn8n 0 ~ 2.8.0 -
n8nn8n 0 ~ 2.6.4 -

II. Public POCs for CVE-2026-56359

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III. Intelligence Information for CVE-2026-56359

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Vendor Advisories for CVE-2026-56359 (2)

Same Patch Batch · n8n · 2026-07-08 · 7 CVEs total

CVE-2026-567767.4 HIGHn8n - Incorrect OAuth Scope Validation in Workflow Test Run Endpoint
CVE-2026-567786.4 MEDIUMn8n - Authorization Bypass in Public API Execution Retry Endpoint
CVE-2026-567755.4 MEDIUMn8n - Incorrect OAuth Scope Validation in Evaluation Test Runs Endpoints
CVE-2026-563604.0 MEDIUMn8n - Webhook Forgery via Unsigned POST Requests in ZendeskTrigger
CVE-2026-59253n8n - Improper Authorization in Workflow Assignment to Folders
CVE-2026-59257n8n - SQL Injection in MySQL v1 executeQuery Operation via Expression Interpolation

IV. Related Vulnerabilities

Same product: n8n
Same vendor: n8n
Same weakness: CWE-79

V. Comments for CVE-2026-56359

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