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.

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Weakness Type (CWE)

CWE-367 CWE-367

References

Other References

https://docs.docker.com/ai/sandboxes/ https://docs.docker.com/ai/sandboxes/security/isolation/ https://github.com/docker/sailor/pull/2021 https://github.com/docker/sandboxes/pull/5342 https://github.com/docker/sbx-releases/releases/tag/v0.42.0

Frequently Asked Questions

What is CVE-2026-79994? +

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.

How do I check if I'm vulnerable to CVE-2026-79994? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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