HTTP Post of form data adds random characters

Issue #17477791 • Assigned to Mohamed S.


Sabahattin K.
May 11, 2018
This issue is public.
Found in
  • Microsoft Edge
Found in build #
Reported by 9 people

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Steps to reproduce

whenever i tried to update my database with edge browser only it adds random characters to the value selected


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    Comments and activity

    • Microsoft Edge Team

      Changed Assigned To to “Steven K.”

    • Hi Sabahattin,

      Will you provide a repro for this?  I need to be able to be able to reproduce this issue.

      Thank you for the help,


    • I’m having the same problem. We have a classic ASP application which POSTs values from a select tag back to the server. Edge (42.17134.1.0) will add a random character to the end of the selected value when the POST occurs about 90% of the time. I know that it’s being generated by Edge because I can see it in the POST values in Fiddler. I’ve tested it in IE, Chrome, and Firefox, and the behavior does not occur in any other browser. I also tested an earlier build of Edge (38.14393.2068.0), and it does not occur there, either.
      To further complicate matters, it only occurs on the first 2 columns of 15 total columns in the form table.

    • Also see Issue #17358578, at it appears to be the same problem.

    • Microsoft Edge Team

      Changed Assigned To to “Mohamed S.”

    • This is bad TBH… Repros for me.

    • You can reproduce this problem on our shopping basket page as you go through the checkout process. The page is returned with errors as there are bad characters appending to the data in several of the credit card fields.

      It is specific to every user that attempts to checkout with Windows 10 Edge 17.17134.

      This problem began with the release of this version and is increasing in frequency as more browsers get updated.

      Contact me at and I can show you the issue. This is a major problem. Is there a workaround as of yet?

      field user entered value Error

      card_exp_month 11@
      card_exp_year 2019댊

    • We competed a workaround today, but seriously Microsoft, this is a bad bug in your browser.

    • We have the same issue. We have notified all our customers to not use Edge until this issue is resolved.

    • I reproduced and worked on some solutions.

    • Any eta on a bug fix?
      We have implemented workarounds and are telling users to avoid Edge.

      I do not understand how Microsoft has known about such a terrible bug since early May and has still not released a fix.

    • They should release an emergency fix. Pretty astounding this made it past QA, and has not been fixed for weeks.

    • Hello all,

      I was able to create a repro for this and forwarded that on about 4 days ago.  I believe you can see the update when the ticket was assigned to no one and then again to someone in the correct team (part of the process).  The issue is being worked on.  I apologize for not sending an update.  I do not have information on when the fix will be available yet.  We will post back when we do know more.

      @Steve K., excellent repro.  Appreciate you creating that.  I did not try the injectable and also did not create a repro with all the options at once, so that is very nice.


    • Microsoft Edge Team

      Changed Title from “html select tag adds random characters” to “HTTP Post of form data adds random characters”

    • @Alex, what was your workaround?

      It appears based on Steve K’s (not me) repro that explicitly setting the option values will prevent this issue from happening.

      <select name="edge2">
                  <option value="N">N</option>
                  <option value="Y">Y</option>

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