Bug Description

When using the Send Mail and Wait node in a workflow with webhook resume URLs, clicking the generated /webhook-waiting/ URL does not resume the execution. Instead, the n8n server returns a 200 OK response with Content-Type: text/html, serving the frontend Vue.js SPA. The SPA's Vue Router then renders a 404 page because it doesn't recognize /webhook-waiting/ as a frontend route.

The backend webhook handler never processes the request — it falls through to the catch-all that serves index.html.

<img width="421" height="431" alt="Image" src="https://github.com/user-attachments/assets/eef4602e-bb57-485f-ba4d-fae746025e53" /> <img width="1257" height="125" alt="Image" src="https://github.com/user-attachments/assets/7f7930e5-5830-44f9-bc35-2f00d88581fa" />

To Reproduce

1. Create a workflow with a Wait node configured to resume on webhook call
2. Trigger the workflow so it reaches the Wait node (execution status shows "Waiting")
3. Copy the generated resume URL (format: /webhook-waiting/{executionId}/{nodeId}?approved=true&signature=...)
4. Open the URL in a browser
5. Instead of resuming the workflow, the n8n editor UI loads and shows a 404 page

Expected behavior

The /webhook-waiting/ URL should be intercepted by n8n's backend server, match the waiting execution, and resume the workflow. The response should be an API response (JSON or redirect), not the frontend HTML.

Actual behavior

The backend does not handle the route. The server responds with 200 OK and the full SPA HTML (index.html). The waiting execution is never resumed.

Both URL formats were tested with identical results:

/webhook-waiting/{executionId}/{nodeId}?params → SPA HTML /webhook-waiting/{nodeId}?params → SPA HTML

Debug Info

Debug info

core

• n8nVersion: 2.18.4
• platform: docker (self-hosted)
• nodeJsVersion: 24.14.1
• nodeEnv: production
• database: postgres
• executionMode: scaling (multi-main)
• concurrency: -1
• license: enterprise (production)
• consumerId: 5649a6ee-2ae2-4c8e-af69-ca48ae36ed05

storage

• success: all
• error: all
• progress: false
• manual: true
• binaryMode: database

pruning

• enabled: false

client

• userAgent: mozilla/5.0 (windows nt 10.0; win64; x64) applewebkit/537.36 (khtml, like gecko) chrome/147.0.0.0 safari/537.36
• isTouchDevice: false

Generated at: 2026-05-08T06:25:59.834Z

Operating System

Windows

n8n Version

2.18.4

Node.js Version

24.14.1

Database

PostgreSQL

Execution mode

main (default)

Hosting

self hosted