CORS Issue iframe

Confirmed Issue #11451575 • Assigned to Nicolas A.


Venkatakrishnan K.
Mar 30, 2017
This issue is public.
Found in
  • Microsoft Edge
Reported by 1 person

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Steps to reproduce

In our website, we try to access a url [ajax] of another domain from within an iFrame. OPTIONS is being sent to verify whether to allow or not.

Randomly these OPTIONS call take huge time to get the response and some comes in milliseconds. This work fine in all modern browsers even in IE 11 but not in EDGE.

Attached some screenshots which explains the behaviour.


1 attachment

Comments and activity

  • Its kinda urgent for our company as we have public release next week, where edge users are facing problem. It would be great if some technical person look at this sooner.

  • Hi Venkatakrishnan,

    I will look at it today and let you know.

  • Microsoft Edge Team

    Changed Assigned To to “Steven K.”

  • Ventaktakrishnan,

    Can you send your ajax code for the request you believe is causing the issue?

    Also, can you provide the Windows/Edge version you are using? (Go to start menu, type “winver” in
    search box and then press Enter)

    Thank you

  • Microsoft Edge Team

    Changed Assigned To to “Lee H.”

  • Steven K,

    Thanks for the response.

    1. The issue was noticed in the windows 10 systems, where automatic updates are enabled and having latest versions.
    2. Important Note: This started happening very recently, as couple of weeks back we did not notice any issue in the EDGE. Any recent updates ?
    3. As an immediate fix we made some code changes to avoid any CORS and no issues now noticed in EDGE, as we are nearing a public release. But this resulted in our proposed architecture to be changed.
    4. Attached a javascript which explains how we do a AJAX call.
  • Microsoft Edge Team

    Changed Assigned To to “Venkat K.”

    Changed Assigned To from “Venkat K.” to “Scott W.”

    Changed Status to “Confirmed”

  • I see the status as confirmed.
    Request you to share the status and workaround if any till the issue is solved

  • Microsoft Edge Team

    Changed Assigned To from “Scott W.” to “Nicolas A.”

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