GHSA-wff4-fpwg-qqv3

### Impact

When specific requests are made to the Next.js server it can cause an `unhandledRejection` in the server which can crash the process to exit in specific Node.js versions with strict `unhandledRejection` handling.

- Affected: All of the following must be true to be affected by this CVE
- Node.js version above v15.0.0 being used with strict `unhandledRejection` exiting
- Next.js version v12.2.3
- Using next start or a [custom server](https://nextjs.org/docs/advanced-features/custom-server)

- Not affected: Deployments on Vercel ([vercel.com](https://vercel.com/)) are not affected along with similar environments where `next-server` isn't being shared across requests.

### Patches
https://github.com/vercel/next.js/releases/tag/v12.2.4