Cloudflare Containers flaw exposed residual tenant data

A security researcher reported via bug bounty that Cloudflare Containers reused disk space without wiping, letting new containers sometimes read residual data from previous tenants.

2026-09-24 ~ 2026-09-24 · 3 related posts

• Researchers exploited Cloudflare Containers flaw to read other tenants' residual disk data — matthew_d_green · 2026-09-24
• Cloudflare fixes cross-tenant data exposure in Containers: deleted disks handed to next tenant unwiped — ziv_ravid · 2026-09-24
• Researchers Find Cloudflare Containers Leak Previous Tenant's Data, Including Full Databases — ziv_ravid · 2026-09-24