CVE-2026-79994

Description

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.

References

https://thehackernews.com/2026/09/critical-docker-sandboxes-flaw-lets.html

https://github.com/docker/sbx-releases/releases/tag/v0.42.0

https://github.com/docker/sandboxes/pull/5342

https://github.com/docker/sailor/pull/2021

https://docs.docker.com/ai/sandboxes/security/isolation/

https://docs.docker.com/ai/sandboxes/

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3

CVSS v4

EPSS