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CVE-2026-42306

Moby: Race condition in docker cp allows bind mount redirection to host path

CVSS 3.1 7.2 HIGHEUVD CVSS 3.1 7.2 CVSS 3.1 · [email protected] · Secondary 7.2 HIGHCVSS 3.1 · [email protected] · Primary 7.2 HIGHCVSS_V3 Publisher rating HIGHFixed by github.com/moby/moby/v2 2.0.0-beta.14osv · severity unknownFixed by github.com/moby/moby/v2 2.0.0-beta.14KEV status unknown
Original advisory

cve-program · CVE-2026-42306

Published

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.

Read the publisher's advisory

euvd · EUVD-2026-36528

Published

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.

Read the publisher's advisory

nvd · CVE-2026-42306

Published

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.

Read the publisher's advisory

osv · GHSA-rg2x-37c3-w2rh

Published

## Summary 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. ## Details When copying files into a container, the daemon sets up a temporary filesystem view by bind-mounting volumes into a private mount namespace. During this setup, the mount destination is created inside the container root and then a bind mount is attached using the container-relative path resolved to an absolute host path. Between mountpoint creation and the `mount()` syscall, a process running inside the container can replace the destination (or a parent path component) with a symlink pointing to an arbitrary location on the host. The `mount()` syscall follows the symlink, causing the volume to be bind-mounted onto an arbitrary host path instead of the intended container path. ## Impact A malicious container can redirect a volume bind mount to an arbitrary host path. The impact depends on the volume content and mount options: - If the volume is writable, arbitrary host files at the redirected path could be overwritten with the volume's contents. - If the volume is read-only, the host path is masked by the mount for the duration of the operation, causing denial of service. - In all cases the mount is temporary (torn down after the `docker cp` completes), but the effects of any writes persist. ### Conditions for exploitation - A container must have at least one volume mount. - A process inside the container must be able to rapidly create and swap symlinks at the volume mount destination path. - An operator must initiate a `docker cp` into that container, or call the `PUT /containers/{id}/archive` or `HEAD /containers/{id}/archive` API endpoints. ### Not affected - Containers that do not have volume mounts are not affected, as the race occurs during volume bind-mount setup. ## Workarounds - Only run containers from trusted images. - Avoid using `docker cp` with untrusted running containers. - Use authorization plugins to restrict access to the archive API endpoints (`PUT /containers/{id}/archive`, `HEAD /containers/{id}/archive`).

Read the publisher's advisory

osv · GO-2026-5617

Published

A race condition in the Docker daemon allows an attacker to redirect bind mounts to arbitrary host paths during a "docker cp" operation. The affected code is in the daemon package, specifically the openContainerFS method. This is daemon-owned, Linux-specific code and is not intended for external use as a Go library.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-42306

Published

moby

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "moby",
                    "product": "moby",
                    "versions": [
                        {
                            "version": "github.com/docker/docker/daemon <= 28.5.2",
                            "status": "affected"
                        },
                        {
                            "version": "Docker Engine < 29.5.1",
                            "status": "affected"
                        },
                        {
                            "version": "github.com/moby/moby/v2/daemon < 2.0.0-beta.14",
                            "status": "affected"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON

euvd · EUVD-2026-36528

Published

EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.

Original publisher date fields

datePublished: Jun 12, 2026, 6:09:22 PM

dateUpdated: Jun 13, 2026, 3:25:47 AM

11 related source bulletins · separate from aliases

WID-SEC-W-2026-1584: docker: Mehrere Schwachstellen

CVE-2026-41567 · CVE-2026-41568 · CVE-2026-42306

RHSA-2026:68044: Red Hat Security Advisory: Red Hat Edge Manager Version 1.1.4 Security Update

CVE-2026-6377 · CVE-2026-13149 · CVE-2026-25681 · CVE-2026-27136 · CVE-2026-27145 · CVE-2026-33818 · CVE-2026-39820 · CVE-2026-39831 · CVE-2026-41178 · CVE-2026-42306 · CVE-2026-42499 · CVE-2026-42504 · CVE-2026-44740 · CVE-2026-45819 · CVE-2026-46597 · CVE-2026-48050 · CVE-2026-50162 · CVE-2026-56853 · CVE-2026-56858 · CVE-2026-56859 · CVE-2026-56860 · CVE-2026-56862 · CVE-2026-59869 · CVE-2026-69152 · CVE-2026-71556 · CVE-2026-73088 · CVE-2026-73089 · CVE-2026-73643 · CVE-2026-75899 · CVE-2026-75931 · CVE-2026-75975 · CVE-2026-76172 · CVE-2026-81521 · CVE-2026-84292 · CVE-2026-84375 · CVE-2026-84394

RHSA-2026:59467: Red Hat Security Advisory: Red Hat OpenShift API for Data Protection

CVE-2026-25681 · CVE-2026-27136 · CVE-2026-33811 · CVE-2026-39820 · CVE-2026-39828 · CVE-2026-39829 · CVE-2026-39830 · CVE-2026-39831 · CVE-2026-39835 · CVE-2026-42306 · CVE-2026-42499 · CVE-2026-42502 · CVE-2026-42508 · CVE-2026-44740 · CVE-2026-46595 · CVE-2026-46597 · CVE-2026-53488 · CVE-2026-53492 · CVE-2026-71235

RHSA-2026:55810: Red Hat Security Advisory: Multicluster Global Hub 1.4.8 security update

CVE-2026-33376 · CVE-2026-33377 · CVE-2026-42306 · CVE-2026-55969 · CVE-2026-66801

RHSA-2026:53530: Red Hat Security Advisory: Multicluster Global Hub 1.7.2 security update

CVE-2026-27145 · CVE-2026-33376 · CVE-2026-33377 · CVE-2026-33811 · CVE-2026-39821 · CVE-2026-42151 · CVE-2026-42154 · CVE-2026-42306 · CVE-2026-43870 · CVE-2026-46384 · CVE-2026-46385 · CVE-2026-53488 · CVE-2026-53492 · CVE-2026-55677 · CVE-2026-55969 · CVE-2026-66801

RHSA-2026:54392: Red Hat Security Advisory: Multicluster Global Hub 1.6.5 security update

CVE-2026-42306 · CVE-2026-55969 · CVE-2026-66801

RHSA-2026:51057: Red Hat Security Advisory: OpenShift Source To Image 1.6.3

CVE-2026-27145 · CVE-2026-33811 · CVE-2026-41567 · CVE-2026-42306 · CVE-2026-42504

RHSA-2026:68253: Red Hat Security Advisory: Red Hat Edge Manager Version 1.1.4 Security Update

CVE-2026-6377 · CVE-2026-13149 · CVE-2026-25681 · CVE-2026-27136 · CVE-2026-39820 · CVE-2026-39831 · CVE-2026-41178 · CVE-2026-42306 · CVE-2026-42499 · CVE-2026-44740 · CVE-2026-45819 · CVE-2026-46597 · CVE-2026-48050 · CVE-2026-50162 · CVE-2026-56858 · CVE-2026-56859 · CVE-2026-59869 · CVE-2026-69152 · CVE-2026-71556 · CVE-2026-73088 · CVE-2026-73089 · CVE-2026-73643 · CVE-2026-75899 · CVE-2026-75931 · CVE-2026-75975 · CVE-2026-76172 · CVE-2026-81521 · CVE-2026-84292 · CVE-2026-84375 · CVE-2026-84394

RHSA-2026:51033: Red Hat Security Advisory: Red Hat OpenShift API for Data Protection

CVE-2024-25621 · CVE-2025-61726 · CVE-2025-61728 · CVE-2025-61729 · CVE-2025-66506 · CVE-2025-68121 · CVE-2026-25681 · CVE-2026-27136 · CVE-2026-32280 · CVE-2026-32281 · CVE-2026-32282 · CVE-2026-33186 · CVE-2026-33747 · CVE-2026-33748 · CVE-2026-33810 · CVE-2026-33811 · CVE-2026-34986 · CVE-2026-39820 · CVE-2026-39821 · CVE-2026-39828 · CVE-2026-39829 · CVE-2026-39830 · CVE-2026-39831 · CVE-2026-39835 · CVE-2026-42306 · CVE-2026-42499 · CVE-2026-42508 · CVE-2026-44740 · CVE-2026-46595 · CVE-2026-46597 · CVE-2026-53488 · CVE-2026-53492

RHSA-2026:54577: Red Hat Security Advisory: Multicluster Global Hub 1.5.7 security update

CVE-2026-42306 · CVE-2026-55969 · CVE-2026-66801

RHSA-2026:68334: Red Hat Security Advisory: Red Hat Edge Manager Version 1.1.4 Security Update

CVE-2026-25681 · CVE-2026-27136 · CVE-2026-27145 · CVE-2026-33810 · CVE-2026-33818 · CVE-2026-39820 · CVE-2026-39831 · CVE-2026-41178 · CVE-2026-42306 · CVE-2026-42499 · CVE-2026-42504 · CVE-2026-44740 · CVE-2026-46597 · CVE-2026-48050 · CVE-2026-56852 · CVE-2026-56853 · CVE-2026-56858 · CVE-2026-56859 · CVE-2026-56860 · CVE-2026-56862 · CVE-2026-69153 · CVE-2026-71556 · CVE-2026-81521

No normalized affected-package data is projected for this source revision. The original publisher record may contain additional product and version evidence; this does not establish that a package is unaffected.

Original source record · Cite this exact observation · Complete original publisher JSON

nvd · CVE-2026-42306

Published

NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.

Source analysis status: Analyzed

Weakness classifications: CWE-61 · CWE-367

Original publisher date fields

published: 2026-06-12T19:16:27.490

lastModified: 2026-06-17T10:47:39.960

16 source CPE criteria · context only
  • cpe:2.3:a:docker:engine:*:*:*:*:*:*:*:*
  • cpe:2.3:a:mobyproject:moby:*:*:*:*:*:*:*:*
  • cpe:2.3:a:mobyproject:moby\/v2:2.0.0:beta0:*:*:*:*:*:*
  • cpe:2.3:a:mobyproject:moby\/v2:2.0.0:beta1:*:*:*:*:*:*
  • cpe:2.3:a:mobyproject:moby\/v2:2.0.0:beta10:*:*:*:*:*:*
  • cpe:2.3:a:mobyproject:moby\/v2:2.0.0:beta11:*:*:*:*:*:*
  • cpe:2.3:a:mobyproject:moby\/v2:2.0.0:beta12:*:*:*:*:*:*
  • cpe:2.3:a:mobyproject:moby\/v2:2.0.0:beta13:*:*:*:*:*:*
  • cpe:2.3:a:mobyproject:moby\/v2:2.0.0:beta2:*:*:*:*:*:*
  • cpe:2.3:a:mobyproject:moby\/v2:2.0.0:beta3:*:*:*:*:*:*
  • cpe:2.3:a:mobyproject:moby\/v2:2.0.0:beta4:*:*:*:*:*:*
  • cpe:2.3:a:mobyproject:moby\/v2:2.0.0:beta5:*:*:*:*:*:*
  • cpe:2.3:a:mobyproject:moby\/v2:2.0.0:beta6:*:*:*:*:*:*
  • cpe:2.3:a:mobyproject:moby\/v2:2.0.0:beta7:*:*:*:*:*:*
  • cpe:2.3:a:mobyproject:moby\/v2:2.0.0:beta8:*:*:*:*:*:*
  • cpe:2.3:a:mobyproject:moby\/v2:2.0.0:beta9:*:*:*:*:*:*

The original JSON retains the logical configuration operators, exclusions and version bounds.

No normalized affected-package data is projected for this source revision. The original publisher record may contain additional product and version evidence; this does not establish that a package is unaffected.

Original source record · Cite this exact observation · Complete original publisher JSON

osv · GHSA-rg2x-37c3-w2rh

Published

github.com/docker/docker

Go

SEMVER · introduced 0 → last_affected 28.5.2

github.com/moby/moby/v2

Go

SEMVER · introduced 0 → fixed 2.0.0-beta.14

github.com/moby/moby

Go

SEMVER · introduced 0 → last_affected 28.5.2

Original source record · Cite this exact observation · Complete original publisher JSON

osv · GO-2026-5617

Published

github.com/docker/docker

Go

SEMVER · introduced 0

github.com/moby/moby

Go

SEMVER · introduced 0

github.com/moby/moby/v2

Go

SEMVER · introduced 0 → fixed 2.0.0-beta.14

Original source record · Cite this exact observation · Complete original publisher JSON

ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 15 Nov 20:10 UTC · 254 of 275 readable · 250 fully read · documentation 469/469 current

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