New deployments with vulnerable versions of the third-party package next-mdx-remote are now blocked by default

Vercel News Feb 12, 2026

Any new deployment containing a version of the third-party package next-mdx-remote that is vulnerable to CVE-2026-0969 will now automatically fail to deploy on Vercel.

We strongly recommend upgrading to a patched version regardless of your hosting provider.

This automatic protection can be disabled by setting the DANGEROUSLY_DEPLOY_VULNERABLE_CVE_2026_0969=1 environment variable on your Vercel project. Learn more

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