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Cloudflare Containers
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- 1Cloudflare patches cross-tenant flaw in Containers product●Cloudflare fixes Containers cross-tenant flaw exposing customer data
Cloudflare has fixed a cross-tenant vulnerability in its Containers service that could have exposed customer data between tenants. The flaw, reported by BleepingComputer, was patched after discovery, and the company says the issue affected isolation boundaries in the product. Security researchers and customers are watching the disclosure closely, as cross-tenant bugs in major cloud providers raise concerns about data separation and trust in shared infrastructure.
- 2Cloudflare fixes cross-tenant data exposure in Containers sandboxes●🤖 Cloudflare Containers/Sandboxes cross-tenant data exposure: dm-thin storage pools ran with skip_block_zeroing, so a Wo
A cross-tenant data exposure flaw in Cloudflare's Containers and Sandboxes has been disclosed and fixed. The issue stemmed from dm-thin storage pools running with skip_block_zeroing enabled, meaning newly written 4 KiB pages into unmapped 64 KiB blocks could leave residual data on raw devices. A Workers Paid tenant could reportedly read up to 60 KiB of data left behind by a previous tenant from /dev/vdc. Cloudflare has patched the issue, and security communities are discussing the implications of shared-storage isolation failures in multi-tenant cloud platforms.