EmDash – a spiritual successor to WordPress that solves plugin security
https://blog.cloudflare.com/emdash-wordpress/

Introducing EmDash — the spiritual successor to WordPress that solves plugin security
Today we are launching the beta of EmDash, a full-stack serverless JavaScript CMS built on Astro 6.0. It combines the features of a traditional CMS with modern security, running plugins in sandboxed Worker isolates.
The Cloudflare BlogA WordPress spiritual successor backed by Cloudflare sounds great in theory, but the headline feature, plugin isolation via Dynamic Workers, only works on Cloudflare's runtime. On any other host it's just a TypeScript CMS without the security model that justifies its existence. Open source but architecturally locked in.