CVE-2026-42306: Docker: Race condition in docker cp allows bind mount redirection to host path

May 18, 2026

A race condition during docker cp mount setup allows a malicious container to redirect a bind mount target to an arbitrary host path, potentially overwriting host files or causing denial of service.

References

github.com/advisories/GHSA-rg2x-37c3-w2rh
github.com/moby/moby/security/advisories/GHSA-rg2x-37c3-w2rh
nvd.nist.gov/vuln/detail/CVE-2026-42306

Code Behaviors & Features

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