CVE-2026-103258— n8n before 2.39.6 and 2.40.x before 2.40.1 Filter Bypass via Parameter Interpolation
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 2.39.6 之前以及 2.40.1 之前的 2.40.0 版本中，SendGrid、Freshservice 和 ServiceNow 节点存在未转义参数插值漏洞。攻击者可以利用该漏洞，通过将易受影响的节点参数绑定到不可信的外部输入，从而突破查询字面量限制、绕过过滤机制。攻击者可借此将原本针对单条记录的查找扩展为匹配所有记录的查询，进而暴露大量数据，包括联系人列表、工单和目录条目等。
Possible ATT&CK Techniques 1 AI
T1078 · Valid Accounts
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I. Basic Information for CVE-2026-103258
Vulnerability Information
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Vulnerability Title
n8n before 2.39.6 and 2.40.x before 2.40.1 Filter Bypass via Parameter Interpolation
Source: CVE Program / CVE List V5
Vulnerability Description
n8n versions before 2.39.6 and 2.40.0 before 2.40.1 contain an unescaped parameter interpolation vulnerability in SendGrid, Freshservice, and ServiceNow nodes that allows attackers to bypass filters by breaking out of query literals. Attackers can exploit this by binding vulnerable node parameters to untrusted external input to widen single-record lookups into match-all queries, exposing bulk data including contact lists, tickets, and directory entries.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
数据查询逻辑中特殊元素的不当中和
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-103258
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2026-103258 (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-2026-103252 | 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-2026-103254 | 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-2026-103256
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 -
CVE-2026-103255
n8n before 1.123.80, 2.39.6, and 2.40.1 Path Traversal and Q
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-2026-103257
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 -
CVE-2026-103255
n8n before 1.123.80, 2.39.6, and 2.40.1 Path Traversal and Q
Same weakness: CWE-943
-
CVE-2026-103289
Ghost 5.9.0 before 6.44.1 Authorization Bypass via Comments -
CVE-2026-103250
n8n before 1.123.80, 2.39.6, and 2.40.1 NoSQL Injection via -
CVE-2026-81914
Apache Airflow Google provider: Google Drive query injection -
CVE-2026-100631
Parse Server 9.0.0 Unauthenticated Installation Deletion via -
CVE-2026-97228
Rapid7 Bulk Export MCP — GraphQL Query Injection in Export S
V. Comments for CVE-2026-103258
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