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

7.2HIGH

Key Information:

Vendor

Moby

Status
Moby
Vendor
CVE Published:
12 June 2026

What is CVE-2026-42306?

Moby is an open source container framework. In Docker Engine prior to version 29.5.1, Docker Daemon versions 28.5.2 and prior, and Moby Daemon prior to version 2.0.0-beta.14, 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. This issue has been patched in Docker Engine version 29.5.1 and Moby Daemon version 2.0.0-beta.14.

Affected Version(s)

moby github.com/docker/docker/daemon <= 28.5.2 <= github.com/docker/docker/daemon 28.5.2

moby Docker Engine < 29.5.1 < Docker Engine 29.5.1

moby github.com/moby/moby/v2/daemon < 2.0.0-beta.14 < github.com/moby/moby/v2/daemon 2.0.0-beta.14

References

https://github.com/moby/moby/security/advisories/GHSA-rg2...
x_refsource_CONFIRM

CVSS V3.1

Score:
7.2
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Local
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.