How Cloudflare addressed a cross-tenant data exposure vulnerability in Containers

发生了什么

On September 4, 2026, Oren Yomtov, a security researcher from Accomplish , responsibly reported a vulnerability affecting Cloudflare Containers and Cloudflare Sandboxes (which is built on Containers), through Cloudflare’s bug bounty program . Cloudflare has fully remediated the vulnerability, and we have no evidence that customer data has been compromised. This post was prepared in collaboration with Oren Yomtov and…

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