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CVE-2026-85166— n8n before 2.36.2 Credential Exfiltration via Workflow Tool Node

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公司开源的一款支持持续集成与交付的工作流自动化工具。 n8n 2.35.4之前版本和2.36.2版本之前的2.36.x版本存在授权问题漏洞，该漏洞源于未验证执行内联子工作流节点（如Workflow Tool节点）的内联工作流JSON中的凭据引用，共享工作流编辑器或通过REST API、Public API、MCP创建/更新工作流的用户可持久化引用其未拥有的凭据，当工作流以持有该凭据的身份执行时，内联子工作流解析密钥并发送至攻击者控制的端点，导致凭据泄露。

CVSS 7.2 · High EPSS 0.36% · P28

Affected Version Matrix 4

VendorProduct Version RangeStatus
n8n-io n8n < 2.36.2 affected
2.36.2 unaffected
< 2.35.4 affected
2.35.4 unaffected
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I. Basic Information for CVE-2026-85166

Vulnerability Information
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Vulnerability Title
n8n before 2.36.2 Credential Exfiltration via Workflow Tool Node
Source: CVE Program / CVE List V5
Vulnerability Description
n8n before 2.35.4 and 2.36.x before 2.36.2 does not validate credential references in the inline workflow JSON of nodes that execute an inline sub-workflow (e.g., the Workflow Tool node). A shared-workflow editor, or any user creating/updating a workflow via the REST API, Public API, or MCP, can persist a node referencing a credential they do not own. When the workflow is later executed under an identity that holds the credential, the inline sub-workflow resolves the secret and can send it to an attacker-controlled endpoint, resulting in credential exfiltration.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:H/SA:L
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
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公司开源的一款支持持续集成与交付的工作流自动化工具。 n8n 2.35.4之前版本和2.36.2版本之前的2.36.x版本存在授权问题漏洞，该漏洞源于未验证执行内联子工作流节点（如Workflow Tool节点）的内联工作流JSON中的凭据引用，共享工作流编辑器或通过REST API、Public API、MCP创建/更新工作流的用户可持久化引用其未拥有的凭据，当工作流以持有该凭据的身份执行时，内联子工作流解析密钥并发送至攻击者控制的端点，导致凭据泄露。
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 0 ~ 2.36.2 -
n8n-io n8n 0 ~ 2.35.4 -

II. Public POCs for CVE-2026-85166

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III. Intelligence Information for CVE-2026-85166

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Vendor Advisories for CVE-2026-85166 (2)

Same Patch Batch · n8n-io · 2026-09-03 · 9 CVEs total

CVE-2026-85169 8.7 HIGH n8n before 1.123.73 Remote Code Execution via $fromAI Prototype Leak
CVE-2026-85168 7.7 HIGH n8n before 1.123.73 Remote Code Execution via Git Node
CVE-2026-85165 7.2 HIGH n8n before 2.36.2 Expression Sandbox Bypass via SpreadElement
CVE-2026-85171 7.1 HIGH n8n before 1.123.73 Credential Exposure via Error Logging
CVE-2026-85170 7.1 HIGH n8n before 1.123.73 Local File Read and SSRF via Gmail and Brevo nodes
CVE-2026-85167 6.3 MEDIUM n8n before 2.36.2 Query Injection via Elasticsearch Firestore Nodes
CVE-2026-85172 5.3 MEDIUM n8n before 2.34.1 SSRF via Request Helper URI Validation Bypass
CVE-2026-85173 5.3 MEDIUM n8n before 2.36.2 Missing Authorization via Insights API

IV. Related Vulnerabilities

Same product: n8n
Same vendor: n8n-io
Same weakness: CWE-863

V. Comments for CVE-2026-85166

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