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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.

Cloudflare makes Python Workers GA — with Hyperdrive and first-class platform bindings

The Hyperdrive integration was the practical database unlock; the larger September 21 change is that Python Workers themselves are now GA. Cloudflare is explicitly positioning Python as a production language on Workers, with native platform bindings and framework support rather than an experimental compatibility layer.

Cloudflare’s AI crawler controls can now preserve search while refusing training

Cloudflare’s crawler controls now distinguish between refusing AI training and refusing the crawler itself. The new Disallow AI Training option is designed to keep search discoverability while expressing a training opt-out to operators that meet Cloudflare’s Accountable requirements.

Cloudflare Browser Run can now hard-limit agent sessions to approved hostnames

The useful change is containment rather than another browser-agent feature. Teams can let an agent operate a real browser while constraining its HTTP and HTTPS reach to the site and dependencies the task actually needs, reducing the blast radius of prompt injection, bad tool decisions or untrusted page content.

Cloudflare Workers replaces 3MB and 10MB compressed bundle caps with one 64MiB uncompressed limit

The change makes heavier frameworks and dependency trees deployable to Workers without plan-specific compressed-size ceilings, but it also changes what builders need to measure: the operative limit is now uncompressed Total Upload rather than the gzip number they may have optimized around.

Cloudflare links AI code scanning to live edge exposure before proposing a fix

The interesting part is not another AI scanner. Cloudflare is connecting source-code evidence to what is actually deployed and being attacked at the edge, validating findings outside the model, then preparing both a code patch and, where appropriate, a narrowly scoped WAF mitigation for customer review.