Description
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.
Published: 2026-09-15
Score: 9.4 Critical
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

Vendor Workaround

Use --clone mode and avoid additional read-write host mounts: https://docs.docker.com/ai/sandboxes/usage/#clone-mode

Tracking

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Advisories

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History

Tue, 15 Sep 2026 13:45:00 +0000

Type Values Removed Values Added
Description 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.
Title Docker Sandboxes guest can write arbitrary macOS host files via a symlink in the virtio-fs stored-path fallback
First Time appeared Docker
Docker docker Sandboxes
Weaknesses CWE-59
CPEs cpe:2.3:a:docker:docker_sandboxes:*:*:*:*:*:*:*:*
Vendors & Products Docker
Docker docker Sandboxes
References
Metrics cvssV4_0

{'score': 9.4, 'vector': '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'}

Subscriptions

Docker Docker Sandboxes
cve-icon MITRE

Status: PUBLISHED

Assigner: Docker

Published:

Updated: 2026-09-15T13:32:41.132Z

Reserved: 2026-08-20T15:32:02.935Z

Link: CVE-2026-77179

cve-icon Vulnrichment

No data.

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses
  • CWE-59

    Improper Link Resolution Before File Access ('Link Following')