How severe is CVE-2026-42306?

CVE-2026-42306 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over local access with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is none, integrity high, and availability high.

Is CVE-2026-42306 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-42306?

CVE-2026-42306 primarily affects Docker Engine. In total, 16 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-42306?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-42306 have an EU (EUVD) identifier?

Yes. CVE-2026-42306 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-36528.

When was CVE-2026-42306 published?

CVE-2026-42306 was published on 2026-06-12 and last updated on 2026-06-17.

CVE-2026-42306

CVE-2026-42306 is a high-severity vulnerability in Docker Engine with a CVSS 3.x base score of 7.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-61.

Key facts

Severity: High (CVSS 3.x base score 7.2)
EPSS exploit prediction: 0% (1st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-36528
Weakness: CWE-61
Affected product: Docker Engine
Published: 2026-06-12
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-42306?: 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 severe is CVE-2026-42306?: CVE-2026-42306 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over local access with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is none, integrity high, and availability high.
Is CVE-2026-42306 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-42306?: CVE-2026-42306 primarily affects Docker Engine. In total, 16 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-42306?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-42306 have an EU (EUVD) identifier?: Yes. CVE-2026-42306 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-36528.
When was CVE-2026-42306 published?: CVE-2026-42306 was published on 2026-06-12 and last updated on 2026-06-17.

References

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

Affected products (16)

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:*:*:*:*:*:*

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