Cloudflare Patches Cross-Tenant Disk Data Leak in Containers Service

Fri, 25 Sep 2026 15:49:12 +0000

Engineer — Plan: If your org runs workloads on Cloudflare Containers, audit what sensitive data those containers wrote to disk — it was potentially readable by other tenants before the fix. No patch action on your end; Cloudflare remediated server-side, but assess whether any secrets, credentials, or PII touched container disk storage.
SOC/IR — Skip
Leader — Plan: If Cloudflare Containers is in your environment, confirm with your engineering team what data was stored on container disk volumes and whether it could constitute a material data exposure requiring customer notification or regulatory disclosure review.

Data-Isolation on CuraSec