Is CVE-2026-79994 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-79994 being exploited in the wild.

How severe is CVE-2026-79994?

Informational severity, published 15 September 2026.

Is there a fix for CVE-2026-79994?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-79994 attacked?

It is attacked with local access, in a hosted service.

Am I affected by CVE-2026-79994?

Check whether you run Docker Sandboxes. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-79994: Docker Sandboxes AF_UNIX socket symlink bypass

CVE-2026-79994 · Severity: info · Published 2026-09-15

Docker Sandboxes is a feature that allows running isolated guest environments on a host system. The guest-to-host Unix socket relay, which enables controlled communication between the sandboxed guest and the host, contains a path-validation vulnerability. An attacker with guest access can exploit a time-of-check-time-of-use (TOCTOU) flaw by replacing intermediate directories with symlinks after validation, allowing arbitrary socket connections outside the authorized workspace and potentially exposing sensitive host data or capabilities.

Technologies: Docker Sandboxes. Vendors: Docker.

Quick answers

Is CVE-2026-79994 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-79994 being exploited in the wild.
How severe is CVE-2026-79994?: Informational severity, published 15 September 2026.
Which products and versions are affected?: Docker Sandboxes.
Is there a fix for CVE-2026-79994?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-79994 attacked?: It is attacked with local access, in a hosted service.
Am I affected by CVE-2026-79994?: Check whether you run Docker Sandboxes. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The vulnerability is a time-of-check-time-of-use (TOCTOU) flaw in the guest-to-host Unix-domain socket relay. The vulnerable component validates that a socket path resides within an authorized workspace, but then uses the original pathname to establish the connection without re-validating. A malicious guest can replace an intermediate directory component with a symlink between the validation step and the actual connection, causing the host to connect to an arbitrary AF_UNIX socket outside the shared workspace. This allows exposure of data or host-side capabilities bound to targeted sockets. The vulnerability requires guest-level access to trigger, and the attack is path-based rather than network-based. A patch should implement atomic path resolution or re-validation at connection time.

Affected products

Docker Sandboxes

Timeline

2026-09-15: disclosed

References

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