{"id":"CVE-2026-103916","title":"Docker Sandboxes sbx cp follows workspace symlinks outside the authorized host directory","summary":"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 san…","severity":"high","cvss":8.4,"cvssVector":"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","cvssSource":"cna","cwe":["CWE-59"],"vendor":"Docker","product":"Docker Sandboxes","affected":["sandboxes >= 0.28.0 < 0.51.0"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-03T17:43:09.265927Z"},"published":"2026-11-03","updated":"2026-11-03","sourceUpdated":"2026-11-03T17:43:23.309Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-103916","references":[{"url":"https://docs.docker.com/ai/sandboxes/"},{"url":"https://docs.docker.com/ai/sandboxes/security/isolation/"},{"url":"https://github.com/docker/sbx-releases/releases/tag/v0.51.0"}],"tags":["cve.org"],"epss":0.0021,"epssPercentile":0.11313,"ingestedAt":"2026-11-05T20:33:06.327Z","slug":"CVE-2026-103916","body":"## Overview\n\nDocker 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.\n\n## Affected\n\n- `sandboxes >= 0.28.0 < 0.51.0`\n\n## Remediation\n\nUpgrade Docker Sandboxes to version 0.51.0 or later.\n\n### Workarounds\n\nUntil 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.","depth":"twilight","depthScore":46,"depthScoreParts":{"impact":46.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}