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This article details CVE-2026-17106 ("CopyEscape"), a critical vulnerability in Docker's archive extraction logic that allows malicious containers to overwrite host files and escalate privileges. The flaw stems from how the daemon handles symbolic links during tar archive creation and extraction, enabling attackers to bypass intended file system boundaries. For AI/quantum practitioners relying on containerized environments, this represents a significant infrastructure risk requiring immediate patching of Docker and moby components.

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CopyEscape Docker Flaw Lets Malicious Containers Overwrite Host Files and Gain Root Access

Cybersecurity NewsOctober 1, 20264 min read

A Docker flaw, CVE-2026-17106 (dubbed CopyEscape), lets malicious containers write files outside the docker cp destination, potentially enabling code execution and root-level compromise. The issue affects Docker’s archive extraction handling in moby/go-archive. When users copy files from a container to a host, Docker does not perform a simple direct transfer. The Docker daemon first packages […] The post CopyEscape Docker Flaw Lets Malicious Containers Overwrite Host Files and Gain Root Access appeared first on Cyber Security News.

A Docker flaw, CVE-2026-17106 (dubbed CopyEscape), lets malicious containers write files outside the docker cp destination, potentially enabling code execution and root-level compromise. The issue affects Docker’s archive extraction handling in moby/go-archive. When users copy files from a container to a host, Docker does not perform a simple direct transfer. The Docker daemon first packages the requested container files into a tar archive,…

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