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Cloudflare Containers exposed previous tenants’ disk data through unzeroed blocks

This was not a Firecracker escape or access to a live victim disk. It was a storage-isolation failure underneath the sandbox: researchers recovered foreign directory structures, database pages and complete SQLite databases from reused blocks, and Cloudflare had to fix allocation plus retire existing disks and cached snapshots.

Amazon SES can now switch open and click tracking per email request

The new request-level controls make email measurement a per-send decision: an application can keep one SES configuration set while disabling open or click tracking for recipients who should not be measured. The override wins over the configuration-set default and adds no separate feature charge.

Cloudflare Containers can now let each Durable Object choose its own runtime — and snapshot its filesystem

The architectural shift is from application-wide container configuration toward individually managed stateful compute. A Durable Object can now start its own image and size, keep an independent lifecycle and restore filesystem state without treating every instance as part of one rollout.