CVE-2026-123039 Local privilege escalation to root in the DynamicCLI daemon via local world-writable control socket
Any local user can send commands to a world-writable DynamicCLI socket to run them as root on Gaia OS.
- 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-2026-123039?
CVE-2026-123039 is a high-severity privilege escalation vulnerability in checkpoint Quantum Security Gateway, 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
The Gaia OS DynamicCLI daemon runs as root and listens on a world-writable local socket (/tmp/dynamic_socket) without authenticating connecting processes. An authenticated local user can send a command to the socket and have it executed as root.
Which versions are affected by CVE-2026-123039?
An affected version is exposed as installed. No special setting or call is needed.
How do I fix CVE-2026-123039?
No fix has been published for CVE-2026-123039 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-2026-123039 being exploited?
There is no known exploitation of CVE-2026-123039 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-m95q-vgfj-2v8g.