CVE-2026-103255— n8n before 1.123.80, 2.39.6, and 2.40.1 Path Traversal and Query Injection via Supabase
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 在以下版本中存在路径遍历漏洞：1.123.80 之前的版本、2.0.0 至 2.39.6（不含）的版本，以及 2.40.0 至 2.40.1（不含）的版本。该漏洞存在于 Supabase 节点中，其中 参数在未经任何验证的情况下被直接插入到请求路径中。攻击者可以利用将 绑定到不可信输入的工作流，遍历访问 Auth（身份验证）和 Storage（存储）API，并使用具有管理员权限的 密钥进行操作。这将绕过行级安全（Row Level Security, RLS）机制，从而允许未授权的数据访问和修改。
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I. Basic Information for CVE-2026-103255
Vulnerability Information
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Vulnerability Title
n8n before 1.123.80, 2.39.6, and 2.40.1 Path Traversal and Query Injection via Supabase
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 a path traversal vulnerability in the Supabase node where the tableId parameter is inserted into request paths without validation. Attackers can exploit workflows binding tableId to untrusted input to traverse to Auth and Storage APIs using the administrative serviceRole key, bypassing Row Level Security and enabling unauthorized data access and modification.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
文件名或路径的外部可控制
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-103255
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2026-103255 (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-2026-103253 | 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-2026-103252 | 7.7 HIGH | n8n before 1.123.80, 2.39.6, and 2.40.1 Information Disclosure via Credential Test Endpoin |
| 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
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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-2026-103256
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 weakness: CWE-73
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V. Comments for CVE-2026-103255
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