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CVE-2026-56360— n8n - Webhook Forgery via Unsigned POST Requests in ZendeskTrigger

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 1.123.18之前版本和2.6.2之前版本存在授权问题漏洞，该漏洞源于ZendeskTrigger node未能验证Zendesk webhook上的HMAC-SHA256签名，可能导致知道webhook URL的攻击者发送未签名的POST请求，以任意恶意数据触发工作流。

CVSS 4.0 · Medium EPSS 0.31% · P22

Affected Version Matrix 4

VendorProduct Version RangeStatus
n8n n8n < 1.123.18 affected
1.123.18 unaffected
2.0.0< 2.6.2 affected
2.6.2 unaffected
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I. Basic Information for CVE-2026-56360

Vulnerability Information
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Vulnerability Title
n8n - Webhook Forgery via Unsigned POST Requests in ZendeskTrigger
Source: CVE Program / CVE List V5
Vulnerability Description
n8n before versions 1.123.18 and 2.6.2 fails to verify HMAC-SHA256 signatures on Zendesk webhooks in the ZendeskTrigger node. Attackers who know the webhook URL can send unsigned POST requests to trigger workflows with arbitrary malicious data.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用欺骗进行的认证绕过
Source: CVE Program / CVE List V5
Vulnerability Title
n8n 授权问题漏洞
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 1.123.18之前版本和2.6.2之前版本存在授权问题漏洞，该漏洞源于ZendeskTrigger node未能验证Zendesk webhook上的HMAC-SHA256签名，可能导致知道webhook URL的攻击者发送未签名的POST请求，以任意恶意数据触发工作流。
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 ~ 1.123.18 -

II. Public POCs for CVE-2026-56360

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III. Intelligence Information for CVE-2026-56360

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News Coverage for CVE-2026-56360 (1)

Other References for CVE-2026-56360 (1)

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-2026-56359 5.4 MEDIUM n8n - Cross-Site Scripting in Credential Management OAuth2 Authorization URL
CVE-2026-56775 5.4 MEDIUM n8n - Incorrect OAuth Scope Validation in Evaluation Test Runs Endpoints
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-290

V. Comments for CVE-2026-56360

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