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CVE-2026-42226— n8n: Credential Authorization Bypass in dynamic-node-parameters Allows Foreign API Key Replay

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开源的一个可扩展的工作流自动化工具。 n8n 1.123.33之前版本、2.17.5之前版本和2.18.0之前版本存在安全漏洞，该漏洞源于动态节点参数端点未验证认证调用者是否有权使用提供的凭据引用，可能导致认证用户强制后端使用其他用户的凭据向攻击者控制的基础设施进行身份验证。

AI Predicted 7.4 Difficulty: Moderate EPSS 0.42% · P34

Affected Version Matrix 2

VendorProduct Version RangeStatus
n8n-io n8n < 1.123.33 affected
>= 2.17.0, < 2.17.5 affected
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I. Basic Information for CVE-2026-42226

Vulnerability Information
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Vulnerability Title
n8n: Credential Authorization Bypass in dynamic-node-parameters Allows Foreign API Key Replay
Source: CVE Program / CVE List V5
Vulnerability Description
n8n is an open source workflow automation platform. Prior to versions 1.123.33 and 2.17.5, the dynamic-node-parameters endpoints did not verify whether the authenticated caller was authorized to use a supplied credential reference. An authenticated user with access to a shared workflow could supply a foreign credential ID in the request body, causing the backend to decrypt and use that credential in a helper execution path where the caller also controls the destination URL. This allowed the caller to force the backend to authenticate against attacker-controlled infrastructure using a credential belonging to another user, effectively exfiltrating a reusable API key. The issue is not limited to any single node type; any node that resolves credentials dynamically through these endpoints may be affected. This issue has been patched in versions 1.123.33, 2.17.5, and 2.18.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:L/SC:L/SI:L/SA:L
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
n8n 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
n8n是n8n开源的一个可扩展的工作流自动化工具。 n8n 1.123.33之前版本、2.17.5之前版本和2.18.0之前版本存在安全漏洞，该漏洞源于动态节点参数端点未验证认证调用者是否有权使用提供的凭据引用，可能导致认证用户强制后端使用其他用户的凭据向攻击者控制的基础设施进行身份验证。
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 < 1.123.33 -

II. Public POCs for CVE-2026-42226

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III. Intelligence Information for CVE-2026-42226

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Vendor Advisories for CVE-2026-42226 (1)

Same Patch Batch · n8n-io · 2026-05-04 · 12 CVEs total

CVE-2026-42232 n8n: XML Node Prototype Pollution to RCE
CVE-2026-42233 n8n: SQL Injection in Oracle Database Node via Limit Field
CVE-2026-42229 n8n: SQL Injection in SeaTable Node
CVE-2026-42228 n8n: Hijacking of Unauthenticated Chat Execution
CVE-2026-42235 n8n: XSS via MCP OAuth client
CVE-2026-42236 n8n: Unauthenticated Denial of Service via MCP Client Registration
CVE-2026-42237 n8n: SQL Injection in Snowflake and MySQL Nodes
CVE-2026-42230 n8n: Open Redirect in MCP OAuth Consent Flow
CVE-2026-42234 n8n: Python Task Runner Sandbox Escape
CVE-2026-42227 n8n: Public API Variables IDOR Allows Cross-Project Secret Disclosure
CVE-2026-42231 n8n: Prototype Pollution in XML Webhook Body Parser Leads to RCE

IV. Related Vulnerabilities

Same product: n8n
Same vendor: n8n-io
Same weakness: CWE-862

V. Comments for CVE-2026-42226

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