Next.js critical (blog)

blog/next16-critical.md

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+A critical vulnerability has been identified in the React Server Components (RSC) protocol. The issue is rated CVSS 10.0 and can allow remote code execution when processing attacker-controlled requests in unpatched environments.
+
+<br/>
+The exploit is running code on the server from the client without admin rights, somewhere in the SSR (Server Side Renderer) there is a exploit that allows a client to get unauthorized access to the server running Next.js.
+<br/>
+<br/>
+Next.js is a react framework for making full-stack application with node.js and React.js, it has a complex SSR (Server Side Renderer) which makes it easy to miss things sometimes, however this is a very critical error, i believe it wasn't the staff's fault, things like these are very likely to happen, but Next.js is used by 75% of modern websites.
+<br/>
+
+## Affected versions
+
+- Next.js 15.x
+- Next.js 16.x
+- Next.js 14.3.0-canary.77 and later canary releases
+
+Next.js 13.x, Next.js 14.x stable, Pages Router applications, and the Edge Runtime are not affected.
+
+## Fixed Versions
+
+- 15.0.5
+- 15.1.9
+- 15.2.6
+- 15.3.6
+- 15.4.8
+- 15.5.7
+- 16.0.7
+
+## Conclusion
+
+They have fixed it as seen on the original blog post: https://nextjs.org/blog/CVE-2025-66478
+
+But this shows just how important it is to watch out when working on such complex structures, one small mistake can cost a big price, remote code execution is one of them.