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

Quick assessment

Affected
n8n 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。

CVSS 5.4 · Medium EPSS 0.24% · P14

Affected Version Matrix 4

VendorProduct Version RangeStatus
n8n n8n < 2.8.0 affected
2.8.0 unaffected
< 2.6.4 affected
2.6.4 unaffected
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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: CVE Program / CVE List V5
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: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
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: CVE Program / CVE List V5
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

Vendor Product Affected Versions CPE Subscribe
n8n n8n 0 ~ 2.8.0 -
n8n n8n 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-2026-56776 7.4 HIGH n8n - Incorrect OAuth Scope Validation in Workflow Test Run Endpoint
CVE-2026-56778 6.4 MEDIUM n8n - Authorization Bypass in Public API Execution Retry Endpoint
CVE-2026-56775 5.4 MEDIUM n8n - Incorrect OAuth Scope Validation in Evaluation Test Runs Endpoints
CVE-2026-56360 4.0 MEDIUM n8n - Webhook Forgery via Unsigned POST Requests in ZendeskTrigger
CVE-2026-59253 n8n - Improper Authorization in Workflow Assignment to Folders
CVE-2026-59257 n8n - 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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