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Cloudflare Containers: Vulnerability Allowing Reading of Residual Data from Other Tenants via Reused Blocks

1. Overview Article Title : How Cloudflare addressed a cross-tenant data exposure vulnerability in Containers Publisher : Cloudflare Publication Date : 2026-09-24 Source : Cloudflare Related Sources : Accomplish: Escaping the Cloudflare Sandbox , BleepingComputer Related Malware, Threat Groups, CVEs, Products : Cloudflare Containers…

  • Vulnerability allows reading residual data from other tenants' storage
  • Portions of reused blocks remained untouched after new writes
  • Cloudflare addressed by correcting source title and outlining countermeasures

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