CVE-2026-103252— n8n before 1.123.80, 2.39.6, and 2.40.1 Information Disclosure via Credential Test Endpoint
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 在以下版本中存在授权绕过漏洞：1.123.80 之前的版本、2.0.0 至 2.39.6 之间的版本，以及 2.40.0 至 2.40.1 之前的版本。该漏洞存在于凭据测试端点中，系统在解析项目作用域变量时未验证调用者的访问权限。攻击者可在请求体中指定任意的项目 ID，从而将敏感变量插值到发送至攻击者控制主机的凭据测试请求中，进而实现数据外泄。
Possible ATT&CK Techniques 1 AI
T1528 · Steal Application Access Token
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I. Basic Information for CVE-2026-103252
Vulnerability Information
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Vulnerability Title
n8n before 1.123.80, 2.39.6, and 2.40.1 Information Disclosure via Credential Test Endpoint
Source: CVE Program / CVE List V5
Vulnerability Description
n8n versions before 1.123.80, from 2.0.0 before 2.39.6, and from 2.40.0 before 2.40.1 contain an authorization bypass vulnerability in the credential test endpoint that resolves project-scoped variables without validating caller access. Attackers can specify an arbitrary project ID in the request body to interpolate sensitive variables into credential test requests sent to attacker-controlled hosts for exfiltration.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-103252
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2026-103252 (2)
Same Patch Batch · n8n-io · 2026-10-01 · 16 CVEs total
| CVE-2026-103248 | 9.0 CRITICAL | n8n before 1.123.80, 2.39.6, and 2.40.1 PostgREST Filter Injection via Supabase |
| CVE-2026-103255 | 9.0 CRITICAL | n8n before 1.123.80, 2.39.6, and 2.40.1 Path Traversal and Query Injection via Supabase |
| CVE-2026-103253 | 8.7 HIGH | n8n before 1.123.80, 2.39.6, and 2.40.1 SQL Injection via Oracle Database Drop Table |
| CVE-2026-103247 | 8.5 HIGH | n8n before 1.123.80 Credential Tampering via Duplicate Node IDs |
| CVE-2026-103250 | 8.1 HIGH | n8n before 1.123.80, 2.39.6, and 2.40.1 NoSQL Injection via MongoDB Chat Memory |
| CVE-2026-103257 | 7.7 HIGH | n8n before 1.123.80, 2.39.6, and 2.40.1 Path Traversal via n8n Node |
| CVE-2026-103246 | 7.7 HIGH | n8n before 2.39.6 and 2.40.x before 2.40.1 Credential Disclosure via Node-Tool Introspecti |
| CVE-2026-103249 | 7.6 HIGH | n8n before 1.123.80, 2.39.6, and 2.40.1 Stored DOM XSS via Resource Locator |
| CVE-2026-103259 | 7.6 HIGH | n8n before 2.39.6 and 2.40.x before 2.40.1 Session Token Leak via Dynamic Credentials |
| CVE-2026-103251 | 7.1 HIGH | n8n before 1.123.80, 2.39.6, and 2.40.1 Package Install Validation Bypass via PubSub |
| CVE-2026-103256 | 7.1 HIGH | n8n before 2.39.6 and 2.40.x before 2.40.1 Credentials Leak via preAuthentication Hook |
| CVE-2026-103258 | 6.8 MEDIUM | n8n before 2.39.6 and 2.40.x before 2.40.1 Filter Bypass via Parameter Interpolation |
| CVE-2026-103254 | 6.3 MEDIUM | n8n before 1.123.80, 2.39.6, and 2.40.1 Path Traversal via Resume URL Generation |
| CVE-2026-103245 | 5.3 MEDIUM | n8n before 1.123.80, 2.39.6, and 2.40.1 Missing Webhook Signature Verification |
| CVE-2026-103260 | 4.0 MEDIUM | n8n before 2.39.6 and 2.40.x before 2.40.1 Approval Bypass via Send and Wait Node |
IV. Related Vulnerabilities
Same product: n8n
-
CVE-2026-103260
n8n before 2.39.6 and 2.40.x before 2.40.1 Approval Bypass v -
CVE-2026-103259
n8n before 2.39.6 and 2.40.x before 2.40.1 Session Token Lea -
CVE-2026-103258
n8n before 2.39.6 and 2.40.x before 2.40.1 Filter Bypass via -
CVE-2026-103256
n8n before 2.39.6 and 2.40.x before 2.40.1 Credentials Leak -
CVE-2026-103257
n8n before 1.123.80, 2.39.6, and 2.40.1 Path Traversal via n
Same vendor: n8n-io
-
CVE-2026-103260
n8n before 2.39.6 and 2.40.x before 2.40.1 Approval Bypass v -
CVE-2026-103259
n8n before 2.39.6 and 2.40.x before 2.40.1 Session Token Lea -
CVE-2026-103258
n8n before 2.39.6 and 2.40.x before 2.40.1 Filter Bypass via -
CVE-2026-103257
n8n before 1.123.80, 2.39.6, and 2.40.1 Path Traversal via n -
CVE-2026-103256
n8n before 2.39.6 and 2.40.x before 2.40.1 Credentials Leak
Same weakness: CWE-639
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V. Comments for CVE-2026-103252
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