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

Reported by Cloudflare (Rushil Mehra)

Summary by Cyber Security News24 Sep 2026, 17:00 CEST

About this summary. This is a short, independently written summary of an article first published by Cloudflare. Cyber Security News did not report or verify the underlying story. Read the original: https://blog.cloudflare.com/containers-cross-tenant-vulnerability/

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.

Read the full article at Cloudflare →