Deployments of vulnerable Next.js applications are now blocked by default
Vercel now automatically blocks deployments containing vulnerable Next.js versions (CVE-2025-66478) for improved security. This protection can be disabled via an environment variable if needed.
Any new deployment containing a version of Next.js that is vulnerable to will now automatically fail to deploy on Vercel. CVE-2025-66478
We strongly recommend upgrading to a patched version regardless of your hosting provider. Learn more
This automatic protection can be disabled by setting the environment variable on your Vercel project. DANGEROUSLY_DEPLOY_VULNERABLE_CVE_2025_66478=1Learn more
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