Ory is the largest open source community in the world for cloud software application security. We maintain advanced open source security software solving authentication, authorization, access control, application network security, and delegation. Ory implements a variety of industry and best-practice standards including OAuth 2.0 / OAuth 2.1, OpenID Connect, Zero Trust Networking, Google Zanzibar Policy Framework, FIDO2 U2F, WebAuthn, TOTP, and more.

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Hi, I am getting cors error when I am using oathkeeper for my apis. I am getting error as "has been blocked by CORS policy: The 'Access-Control-Allow-Origin' header contains multiple values '<http://localhost:3000>, <http://localhost:3000>', but only one is allowed." in browser. It seems request is getting process but response is blocked by browser. Could you please help me with this. With and without nginx issue is same. I have enable authantication with kratos and oathkeer is having cors enabled.

Hello Sadhana,


this is hard to debug without having access to your code.
Can you share your configuration, logs etc.?

Otherwise please also have a look at the Oathkeeper configuration examples:
<https://github.com/ory/examples>

Can you share your header as well as it seems the error is due to multiple values in the header?