CVE-2026-102371 wsl-pro-service: Ubuntu Pro token exposed via process command-line arguments
An unprivileged local user can read the Ubuntu Pro token from process arguments, allowing unauthorized access to Ubuntu Pro services.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-102371?
CVE-2026-102371 is a medium-severity vulnerability in Canonical Ubuntu Pro for WSL, published on 29 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In wsl-pro-service before 0.1.19ubuntu3, the service component which runs as root inside each WSL instance attaches the instance to Ubuntu Pro by executing the pro client with the Ubuntu Pro token passed as a command-line argument (pro attach <token>). On systems where /proc is mounted without process-hiding mitigations (such as hidepid), which is the default in WSL, an unprivileged local user or process in the same WSL instance can read the token from /proc/<pid>/cmdline while the attach process is running. The leaked token could then be used to attach other machines to the victim's Ubuntu Pro subscription and gain unauthorized access to Ubuntu Pro services.
Weakness: CWE-214
Which versions are affected by CVE-2026-102371?
How do I fix CVE-2026-102371?
Apply the vendor's patch.
Is CVE-2026-102371 being exploited?
There is no known exploitation of CVE-2026-102371 in the wild and no public exploit code.
Sources
Also known as GHSA-j32v-fr72-w8fv, UBUNTU-CVE-2026-102371, USN-8892-1.