Cross-Origin-Opener-Policy Misconfiguration

Anandhu Krishnan
Published on
14 May 2024


Inadequate protection of browsing context can compromise sensitive data by allowing untrusted documents to share the same context, leading to potential data leaks.


To prevent unauthorized access, configure your web server/application to set the Cross-Origin-Opener-Policy header with a value of ‘same-origin’. Consider using modern browsers that support this feature for enhanced security.

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Written by
Anandhu Krishnan
Anandhu Krishnan
Lead Engineer
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