All 5 Security Best Practices in Next.js questions
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Why is it important to never expose sensitive information like API keys inside client components? How do you protect a Next.js application against cross site scripting attacks? How do you set security related HTTP headers, such as Content Security Policy, in a Next.js application? How would you protect server actions from being called with malicious or unauthorized data, since they can be invoked directly from the client?
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What steps should you take to keep dependencies and the Next.js framework itself secure over time?

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Regularly update Next.js and your project's dependencies to receive security patches, use automated tools that scan for known vulnerabilities in your dependencies, remove packages you no longer actually use, and subscribe to security advisories for the frameworks and libraries your project relies on most heavily.
# Check for known vulnerabilities in dependencies
npm audit

# Update Next.js to the latest version
npm install next@latest
Real-world example A development team runs automated dependency scanning as part of their deployment pipeline, catching and fixing a known vulnerability in a third party package before it ever reaches their production users.

Common follow-ups: How often should a team check for outdated or vulnerable dependencies?;What tools can automate dependency vulnerability scanning?

Testing Next.js Applications;Deployment
All 5 Security Best Practices in Next.js questions