CVE-2026-79994: Docker Sandboxes

High severity, CVSS 8.7. EPSS: 0.1% chance of exploitation in the next 30 days.

The guest-to-host Unix-domain socket relay in Docker Sandboxes validates that a socket path is inside an authorized workspace, but later reconnects using the pathname. A malicious guest can replace an intermediate directory with a symlink between validation and connection, causing the host to connect to an arbitrary AF_UNIX socket outside the shared workspace. This can expose data or host-side capabilities provided by the targeted socket.

Affected products

• Docker Docker Sandboxes: from 0.37.0, before 0.42.0 (fixed in 0.42.0)

Published 2026-09-15. Last modified 2026-09-16.