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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 在 2.35.4 之前以及 2.36.x 系列在 2.36.2 之前的版本，未对执行内联子工作流的节点（例如 Workflow Tool 节点）内联工作流 JSON 中的凭据引用进行验证。共享工作流的编辑者，或任何通过 REST API、Public API 或 MCP 创建/更新工作流的用户，可以持久化一个引用了非其本人拥有的凭据的节点。当该工作流随后以一个持有该凭据的身份执行时，内联子工作流会解析出密钥（秘密信息），并可能将其发送至由攻击者控制的端点，从而导致凭据泄露。

CVSS 7.2 · High

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

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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