Feb 19
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Urgent security alert for Next.js and React users. A critical Remote Code Execution vulnerability (CVE 202555182) was disclosed, and unauthenticated attackers can execute code on your server with low complexity. Watch this video to learn exactly who is affected and the immediate steps to lock down your apps. Key takeaways: - What it is: a Remote Code Execution vulnerability in upstream React server component packages, not Next.js itself, but it affects Next.js through its dependency chain. - Severity: labeled critical, easy to exploit, requires zero privileges, and can be triggered remotely. - Versions affected: all stable Next.js 15.x and 16.x versions are vulnerable. Canary builds from 14.3.0-canary77 and up are also affected. - Immediate action: upgrade stable branches to the patched versions right now. For example, Next.js 16 users must upgrade to at least 16.0.7. If you are on an affected canary build, downgrade to a stable 14.x release or back to 14.3.0-canary.76. How to fix in four steps: 1. Open your project's package.json and check the Next.js version. 2. If you are on stable 15.x or 16.x, run your package manager to upgrade to the latest patched version, for example npm install or yarn upgrade, then redeploy. 3. If you are on an affected canary build (14.3.0-canary77 or later), downgrade to a stable 14.x release or to 14.3.0-canary.76. 4. After upgrading or downgrading, rebuild and redeploy, review logs for suspicious activity, and rotate any exposed credentials if you suspect compromise. Why this matters: a single upstream flaw cascaded into a critical ecosystem risk. If you run Next.js, treat this as an emergency and prioritize patching immediately. Tell us what you find. Check your version, patch or downgrade, then leave a comment with your setup so others can learn. Like, subscribe, and share to help spread the word. This video has been generated automatically by AutoContent API - https://autocontentapi.com