CVE-2026-103916

Docker Sandboxes sbx cp follows workspace symlinks outside the authorized host directory

Published Nov 3, 2026 CVSS 4.0 · 8.4 High EPSS < 1% KEV · Not listed
Description
Docker Sandboxes sbx cp does not safely confine host-side paths to a shared workspace. A malicious sandbox can create or replace a workspace symlink so that a later user-initiated copy reads a host file outside the workspace into the sandbox or writes sandbox-controlled data to a host path outside the workspace with the invoking user's permissions.

Remediation

Vendor Solution

Upgrade Docker Sandboxes to version 0.51.0 or later.


Vendor Workaround

Until upgrading, do not use sbx cp with a host-side source or destination inside a workspace writable by untrusted sandbox code. Use a host-only path for the copy instead.

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Docker Sandboxes sbx cp does not safely confine host-side paths to a shared workspace. A malicious sandbox can create or replace a workspace symlink so that a later user-initiated copy reads a host file outside the workspace into the sandbox or writes sandbox-controlled data to a host path outside the workspace with the invoking user's permissions.
Title Docker Sandboxes sbx cp follows workspace symlinks outside the authorized host directory
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': 8.4, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Docker
Published
Updated
Nov 3, 2026, 5:43 PM
Reserved
Oct 1, 2026, 2:18 PM
Status
Awaiting Analysis
Published
Nov 3, 2026, 5:17 PM
Modified
Nov 3, 2026, 8:32 PM