Critical 9.4Published Sep 15, 2026

CVE-2026-77179Docker Sandboxes guest can write arbitrary macOS host files via a symlink in the virtio-fs stored-path fallback

Updated under an hour ago (2026-10-19 06:30 UTC)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

On macOS, the virtio-fs host server used by Docker Sandboxes improperly follows symlinks when reopening an unlinked file from a stored path. A malicious guest can replace a parent directory with a symlink, escape the shared workspace, and read or modify arbitrary host files as the VMM user, potentially achieving host code execution.

CVSS: 9.4 CRITICAL (v4.0, CNA)CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Weakness (CWE): CWE-59
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Docker
NVD analysis: Awaiting Analysis
Record last updated: Sep 15, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Docker Docker Sandboxes docker:docker_sandboxes	from 0.28.0 before 0.42.0	CNA record

References

https://docs.docker.com/ai/sandboxes/product
https://docs.docker.com/ai/sandboxes/security/isolation/product
https://github.com/docker/sbx-releases/releases/tag/v0.42.0release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.