Video: Shield Your Next.js App With a Content Security Policy

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In this talk, the importance of implementing a Content Security Policy (CSP) in Next.js applications is discussed. A CSP is a security layer that restricts browser functionality to protect against cross-site scripting and data injection attacks. You can implement a CSP using meta tags or headers, and in Next.js, directives can be added in the next config file. Tools like csp-evaluator.withgoogle.com and observatory.mozilla.org can help validate your CSP. The concept of a nonce is explained, which allows inline scripts to execute securely. Implementing a report-only CSP initially is recommended to identify and resolve issues before enforcement. You can find a sample Next.js app with CSP on GitHub. The talk also covers how server components retrieve the nonce from the header and how middleware sets the CSP request header. Strategies for dynamically applying directives based on the environment are shared. The video provides a comprehensive guide for developers looking to enhance their Next.js app security with a CSP.

This talk has been presented at React Advanced Conference 2023, check out the latest edition of this React Conference.

Lucas Estevão
Lucas Estevão
6 min
23 Oct, 2023

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