CVE-2026-103916

High

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.

SeverityHigh

CVSS8.4

Exploit probability—

Product

Docker Sandboxes

PublishedNov 3, 2026

First seenNov 4, 2026

Weakness typeCWE-59Improper link resolution

How to fix

Update

docker docker_sandboxes0.51.0 or later

Vendor advisories

github.com/docker/sbx-releases/releases/tag/v0.51.0

Affected products

Product	Affected versions	Fixed in
docker docker_sandboxes	0.28.0 ≤ v < 0.51.0	0.51.0

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