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Vulnerability record · CVE-2026-42306 · published 12 June 2026

CVE-2026-42306: Docker engine toctou race condition vulnerability

Docker · Engine

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.

7.2 CVSS 3.1 High EPSS 0.10% · top 99.2% CWE-61 · CWE-61CWE-367 · TOCTOU race condition
7.2CVSS 3.1 base score
0.10%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
1References
17 Jun 2026Last modified by NVD

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.

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

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Source: NIST National Vulnerability Database (record CVE-2026-42306), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.