CLOUDFLARE-D55495CFD692DEE9 release notes and known issues

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

Scope: Cloudflare products. This update record adds version, fix and known-issue context. Its publication date is not a lifecycle boundary.

Summary

External security researchers at Accomplish identified a vulnerability in Cloudflare Containers that could expose residual disk data from previous workloads. We explain how the issue worked, how we investigated it, and the steps we took to remediate it.

Improvements and security content

External security researchers at Accomplish identified a vulnerability in Cloudflare Containers that could expose residual disk data from previous workloads. We explain how the issue worked, how we investigated it, and the steps we took to remediate it.

Known issues

Publisher statement

Not stated. The verified publisher record does not contain a known-issues statement.

Affected products and versions

Products

Cloudflare products

Affected versions

See the official publisher source for applicability.

Fixed versions or updates

No fixed version is stated in this record.

Recommended action

Review the official publisher document before deployment.

Official publisher evidence

CLOUDFLAREVERIFIED

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

Checked 29 Sep 2026. BlackTree preserves the last verified facts if a later source check is temporarily unavailable.

Open the official publisher source