Cloudflare Addresses Cross-Tenant Data Exposure Vulnerability in Containers
Cloudflare has remediated a cross-tenant data exposure vulnerability in Containers, ensuring customer data remains secure.
On September 4, 2026, a security researcher reported a vulnerability in Cloudflare Containers and Sandboxes. Cloudflare has fully remediated the issue, with no evidence of customer data compromise. The vulnerability allowed potential recovery of residual data from other customers' containers, posing risks to data isolation in multi-tenant environments.
This synthesis was produced from its source by AI; there is no human editor or manual review step. How we work