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.

Attack Vector Local

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction Active

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Docker Docker Sandboxes unaffected
Version Status Constraints
0.28.0 affected < 0.51.0

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Project Subscriptions

Vendors Products
Docker Subscribe
Docker Sandboxes Subscribe
Advisories

No advisories yet.

Fixes

Solution

Upgrade Docker Sandboxes to version 0.51.0 or later.

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.

References
Link Providers
https://docs.docker.com/ai/sandboxes/ cve-icon
https://docs.docker.com/ai/sandboxes/security/isolation/ cve-icon
https://github.com/docker/sbx-releases/releases/tag/v0.51.0 cve-icon
History

Tue, 03 Nov 2026 16:30:00 +0000

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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Docker

Published:

Updated: 2026-11-03T16:19:03.726Z

Reserved: 2026-10-01T14:18:13.769Z

Link: CVE-2026-103916

cve-icon Vulnrichment

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cve-icon NVD

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cve-icon Redhat

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cve-icon OpenCVE Enrichment

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Weaknesses