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CVE-2026-103260— n8n before 2.39.6 and 2.40.x before 2.40.1 Approval Bypass via Send and Wait Node

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 之前的版本中，存在一个审批绕过漏洞，该漏洞位于“发送并等待”（Send and Wait）节点的“在聊天中审批”（Approve Within Chat）模式。攻击者可以在未验证请求者身份或审批权限的情况下提交恢复（resume）请求，从而允许未经认证的用户推进处于等待状态的执行流程，并触发受保护的操作。

CVSS 4.0 · Medium

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-103260

Vulnerability Information
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Vulnerability Title
n8n before 2.39.6 and 2.40.x before 2.40.1 Approval Bypass via Send and Wait Node
Source: CVE Program / CVE List V5
Vulnerability Description
n8n versions before 2.39.6 and 2.40.0 before 2.40.1 contain an approval bypass vulnerability in the Send and Wait node's Approve Within Chat mode. Attackers can submit resume requests without verification of the requester's identity or approval permissions, allowing unauthenticated users to advance waiting executions and trigger guarded actions.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
n8n-io n8n 0 ~ 2.39.6 -

II. Public POCs for CVE-2026-103260

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III. Intelligence Information for CVE-2026-103260

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Vendor Advisories for CVE-2026-103260 (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-2026-103258 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

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-103260

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