endpoint returns 403 in Brave

Description of the issue:
When I try to submit an email via formspree, the form post is rejected with a 403 error logged in the Brave console.

How can this issue be reproduced?

  1. Browse to
  2. Fill out the contact form
  3. Click Submit

Expected result:
The form should be posted to formspree endpoint with a Captcha page

Brave Version( check About Brave):
[Version 1.1.23 Chromium: 79.0.3945.88 (Official Build) (64-bit)])

Additional Information:

  • copied curl request:
    curl ‘<endpoint>’ -H ‘authority:’ -H ‘cache-control:
    max-age=0’ -H ‘origin:’ -H ‘upgrade-insecure-requests: 1’ -H ‘content-type: application/x-www-form-urlencoded’ -H ‘user-agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.79 Safari/537.36’ -H ‘sec-fetch-user: ?1’ -H ‘accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,/;q=0.8,application/signed-exchange;v=b3;q=0.9’ -H ‘sec-fetch-site: cross-site’ -H ‘sec-fetch-mode: navigate’ -H ‘accept-encoding: gzip, deflate, br’ -H ‘accept-language: en-US,en;q=0.9’ --data ‘name=Dale+V+Ross&’ --compressed

  • The form is sent successfully in Chrome browser with a 401 response code

  • Formspree has indicated possible changes to be made

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