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

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Summary

CVECVE-2026-42306
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-12 19:16:27 UTC
Updated2026-06-16 18:31:31 UTC
DescriptionMoby 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.

Risk And Classification

Primary CVSS: v3.1 7.2 HIGH from [email protected]

CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:N/I:H/A:H

EPSS: 0.001040000 probability, percentile 0.012630000 (date 2026-06-22)

Problem Types: CWE-61 | CWE-367 | CWE-61 CWE-61: UNIX Symbolic Link (Symlink) Following | CWE-367 CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary7.2HIGHCVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:N/I:H/A:H
3.1[email protected]Secondary7.2HIGHCVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:N/I:H/A:H
3.1CNADECLARED7.2HIGHCVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:N/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
Required
Scope
Changed
Confidentiality
None
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:N/I:H/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Docker Engine All All All All
Application Mobyproject Moby All All All All
Application Mobyproject Moby/v2 2.0.0 beta0 All All
Application Mobyproject Moby/v2 2.0.0 beta1 All All
Application Mobyproject Moby/v2 2.0.0 beta10 All All
Application Mobyproject Moby/v2 2.0.0 beta11 All All
Application Mobyproject Moby/v2 2.0.0 beta12 All All
Application Mobyproject Moby/v2 2.0.0 beta13 All All
Application Mobyproject Moby/v2 2.0.0 beta2 All All
Application Mobyproject Moby/v2 2.0.0 beta3 All All
Application Mobyproject Moby/v2 2.0.0 beta4 All All
Application Mobyproject Moby/v2 2.0.0 beta5 All All
Application Mobyproject Moby/v2 2.0.0 beta6 All All
Application Mobyproject Moby/v2 2.0.0 beta7 All All
Application Mobyproject Moby/v2 2.0.0 beta8 All All
Application Mobyproject Moby/v2 2.0.0 beta9 All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Moby Moby affected github.com/docker/docker/daemon <= 28.5.2 Not specified
CNA Moby Moby affected Docker Engine < 29.5.1 Not specified
CNA Moby Moby affected github.com/moby/moby/v2/daemon < 2.0.0-beta.14 Not specified

References

ReferenceSourceLinkTags
github.com/moby/moby/security/advisories/GHSA-rg2x-37c3-w2rh [email protected] github.com Mitigation, Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
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