CVE-2026-42306
Docker: Race condition in docker cp allows bind mount redirection to host path
7.2
HIGH
CVSS 3.1
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.
How to fix CVE-2026-42306
To remediate CVE-2026-42306, upgrade the affected package to a fixed version below.
- —no fix listed
- —no fix listed
- —no fix listed
- —upgrade to 2.0.0-beta.14 or later
Is CVE-2026-42306 being exploited?
No exploitation signal available. Neither CISA KEV nor a current EPSS score has been published for CVE-2026-42306.
Affected packages (4)
- from 0
- from 0, <= 28.5.2
- from 0, <= 28.5.2
- from 0, < 2.0.0-beta.14
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.2 | CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:N/I:H/A:H |