CVE-2026-103249— n8n before 1.123.80, 2.39.6, and 2.40.1 Stored DOM XSS via Resource Locator
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 在以下版本中存在存储型 DOM 跨站脚本（XSS）漏洞： 1.123.80 之前的版本 2.0.0 至 2.39.6（不含）之间的版本 2.40.0 至 2.40.1（不含）之间的版本 该漏洞存在于“资源定位器”参数下拉菜单中对外部链接的处理逻辑。工作流作者可注入恶意的脚本 URL，当其他用户打开该节点的下拉菜单并点击外部链接图标时，恶意 JavaScript 代码将在编辑器源（origin）中执行。此外，该攻击载荷在工作流导入和共享过程中会持续保留，从而扩大潜在影响范围。
Possible ATT&CK Techniques 1 AI
T1059.007 · JavaScript
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I. Basic Information for CVE-2026-103249
Vulnerability Information
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Vulnerability Title
n8n before 1.123.80, 2.39.6, and 2.40.1 Stored DOM XSS via Resource Locator
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 stored DOM cross-site scripting vulnerability in Resource Locator parameter dropdown link handling. Workflow authors can inject malicious script URLs that execute arbitrary JavaScript in the editor origin when other users open the node dropdown and click the external-link icon, with the payload persisting across workflow imports and shares.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-103249
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Other References for CVE-2026-103249 (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-2026-103259 | 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-79
-
CVE-2026-103292
Ghost 0.5.3 before 6.50.0 Cross-Site Scripting via ghost_hea -
CVE-2026-103277
Ghost 2.5.0 before 6.34.0 Untrusted Script Execution via oEm -
CVE-2026-7176
Multiple vulnerabilities in Entradium by Crocantickets -
CVE-2026-7175
Multiple vulnerabilities in Entradium by Crocantickets -
CVE-2026-7174
Multiple vulnerabilities in Entradium by Crocantickets
V. Comments for CVE-2026-103249
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