CVE-2026-42306

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

HIGH

7.2

CVSS Score

Published: June 12, 2026 at 06:09 PM UTC

Updated: June 17, 2026 at 10:47 AM UTC

4 products affected across 3 vendorsMobyEngineMoby /v2

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Severity

HIGH7.2

Exploit prediction

EPSS 0.1%

SSVC

No known exploit

Description

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Engine · Docker

95%

v < 29.5.1

Affected range stops below 29.5.1, so it looks safe — our inference, not a vendor statement

Moby · Mobyproject

95%

v ≤ 28.5.2

Moby /v2 · Mobyproject

95%

2.0.0 beta0 2.0.0 beta1 2.0.0 beta10 2.0.0 beta11 2.0.0 beta12 2.0.0 beta13 2.0.0 beta2 2.0.0 beta3 2.0.0 beta4 2.0.0 beta5 2.0.0 beta6 2.0.0 beta7 2.0.0 beta8 2.0.0 beta9

Moby · Moby

60%

v ≤ 28.5.2v < 2.0.0-beta.14v < 29.5.1

Affected range stops below 2.0.0-beta.14, so it looks safe — our inference, not a vendor statement

Affected range stops below 29.5.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://github.com/moby/moby/security/advisories/GHSA-rg2x-37c3-w2rh

References (1)

x_refsource_CONFIRMMitigationVendor Advisory

Source: cverecord

https://github.com/moby/moby/security/advisories/GHSA-rg2x-37c3-w2rh

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.2HIGHGitHub_M

Attack Vector: LOCAL
Complexity: HIGH
Privileges: LOW
User Interaction: REQUIRED
Scope: CHANGED
Confidentiality: NONE
Integrity: HIGH
Availability: HIGH

Vector?

Quick Info

StatusANALYZED

CWE

CWE-61CWE-367

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