id summary reporter owner description type status component version severity resolution keywords cc stage has_patch needs_docs needs_tests needs_better_patch easy ui_ux 34682 Django version 4.2.2 or more over version 4.0 has a major bug related to CSRF_TRUSTED_ORIGINS Rajrup Das nobody "Django version the problem I faced - 4.2.2 OS - musl linux. Hi, while I was making a simple blogging website, i encountered with an issue . When ever I was sending a post request from my react front-end to Django proper url it's keeps telling me 403 request forbidden http://localhost:300 is not in allowed list , but I have already setup CROS in my django project and I am very sure I did it right way.Adding crosheaders in installed apps and other configuration , I have went through some stackoverflow thread to make sure I am doing correctly . But still i was getting the problem . After some research I've discovered this stackoverflow thread [https://stackoverflow.com/questions/70508568/django-csrf-trusted-origins-not-working-as-expected], it's telling me that I need to add scheme like 'http://localhost:3000' and has to has the same thing in allowed domains section. This is the configuration what i have done after going through that stackoverflow thread CSRF_TRUSTED_ORIGINS = [ 'http://localhost:3000', 'http://localhost:8000', ] ALLOWED_HOSTS = ['localhost'] CORS_ORIGIN_WHITELIST = [ 'http://localhost:3000', 'http://localhost:8000' ] But after this when ever I was trying to reload the application I was getting keep getting system error "" {{{ Traceback (most recent call last): File ""/usr/lib/python3.11/threading.py"", line 1038, in _bootstrap_inner self.run() File ""/usr/lib/python3.11/threading.py"", line 975, in run self._target(*self._args, **self._kwargs) File ""/home/rajrup/projects/bloggy/env/lib/python3.11/site-packages/django/utils/autoreload.py"", line 64, in wrapper fn(*args, **kwargs) File ""/home/rajrup/projects/bloggy/env/lib/python3.11/site-packages/django/core/management/commands/runserver.py"", line 133, in inner_run self.check(display_num_errors=True) File ""/home/rajrup/projects/bloggy/env/lib/python3.11/site-packages/django/core/management/base.py"", line 556, in check raise SystemCheckError(msg) django.core.management.base.SystemCheckError: SystemCheckError: System check identified some issues: ERRORS: ?: (4_0.E001) As of Django 4.0, the values in the CSRF_TRUSTED_ORIGINS setting must start with a scheme (usually http:// or https://) but found ['http://localhost:3000', 'http://localhost:8000']. See the release notes for details. System check identified 1 issue (0 silenced). /home/rajrup/projects/bloggy/mrblog/settings.py changed, reloading. Watching for file changes with StatReloader Performing system checks... Exception in thread django-main-thread: Traceback (most recent call last): File ""/usr/lib/python3.11/threading.py"", line 1038, in _bootstrap_inner self.run() File ""/usr/lib/python3.11/threading.py"", line 975, in run self._target(*self._args, **self._kwargs) File ""/home/rajrup/projects/bloggy/env/lib/python3.11/site-packages/django/utils/autoreload.py"", line 64, in wrapper fn(*args, **kwargs) File ""/home/rajrup/projects/bloggy/env/lib/python3.11/site-packages/django/core/management/commands/runserver.py"", line 133, in inner_run self.check(display_num_errors=True) File ""/home/rajrup/projects/bloggy/env/lib/python3.11/site-packages/django/core/management/base.py"", line 556, in check raise SystemCheckError(msg) django.core.management.base.SystemCheckError: SystemCheckError: System check identified some issues: ERRORS: ?: (4_0.E001) As of Django 4.0, the values in the CSRF_TRUSTED_ORIGINS setting must start with a scheme (usually http:// or https://) but found ['http://localhost:3000', 'http://localhost:8000']. See the release notes for details. }}} "", go to this google drive link to check the picture also if you want to trace the full path - [https://drive.google.com/drive/folders/1KK8qmgBKKr4dIOwWS8S9w7EAWxLV5zFF?usp=sharing]. The project it self opensource but i am not giving the link here to make my first Django bug report clutter free. but if you want I can give you the project link also, to be mentioned when I had downgraded and installed django 3.2.19 and the error has gone . To be noted that there is no proper guide to fix such issues or your documentation lack of this guide. Also one thing to mention I have also tried adding http://localhost:3000 in allowed list but didnot worked. " Bug new CSRF 4.2 Normal csrf_bug, csrf_issue, django rajrupofficialid@… Unreviewed 0 0 0 0 0 0