CVE-2026-126329 Docker Sandboxes privilege escalation through untrusted state directories
Local users can substitute sockets and config in untrusted state directories to run commands as root when Docker Sandboxes runs as root.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Harmful if only installed
- No
- Needs a specific call
- No
- Fix
- None listed
What is CVE-2026-126329?
CVE-2026-126329 is a high-severity privilege escalation vulnerability in Docker Sandboxes, published on 12 Nov 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Docker Sandboxes reuses existing state and configuration directories without verifying their ownership. If sbx or sandboxd is run as root with HOME or, on Linux, XDG_STATE_HOME pointing to an attacker-controlled location, a local unprivileged user can substitute control-plane sockets and configuration trusted by the root process, potentially executing commands as root. Exploitation requires a privileged invocation with an attacker-influenced environment. The issue affects Linux and macOS and is fixed in version 0.53.0.
Weakness: CWE-282
Which versions are affected by CVE-2026-126329?
Only installations with a non-default setting turned on are exposed.
How do I fix CVE-2026-126329?
No fix has been published for CVE-2026-126329 yet. Limit exposure of the affected software until one is available.
Upgrade, and run services with the fewest rights they need. More about Privilege escalation.
Is CVE-2026-126329 being exploited?
There is no known exploitation of CVE-2026-126329 in the wild and no public exploit code.
Sources
Also known as GHSA-w92q-8xxw-h4r9.