CVE-2026-79994 Docker Sandboxes UDS forwarder can reach arbitrary host Unix sockets through a symlink race
A malicious guest can exploit a symlink race to connect the host to arbitrary Unix sockets, potentially exposing sensitive data or capabilities.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-79994?
CVE-2026-79994 is a high-severity vulnerability in Docker Sandboxes, published on 15 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-367
Which versions are affected by CVE-2026-79994?
How do I fix CVE-2026-79994?
No fix has been published for CVE-2026-79994 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-79994 being exploited?
There is no known exploitation of CVE-2026-79994 in the wild and no public exploit code.
Sources
Also known as GHSA-wq46-97v9-q386, UBUNTU-CVE-2026-79994.