CVE-2026-102371

wsl-pro-service: Ubuntu Pro token exposed via process command-line arguments

Published Sep 29, 2026 CVSS 4.0 · 5.7 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Ubuntu USN Ubuntu USN USN-8892-1 Ubuntu Pro for WSL vulnerability
History
Type Values Removed Values Added
First Time appeared Canonical
Canonical ubuntu Pro For Wsl
Vendors & Products Canonical
Canonical ubuntu Pro For Wsl
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title wsl-pro-service: Ubuntu Pro token exposed via process command-line arguments
Weaknesses CWE-214
References
Metrics cvssV4_0

{'score': 5.7, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
canonical
Published
Updated
Sep 30, 2026, 3:28 PM
Reserved
Sep 28, 2026, 11:44 PM
Status
Awaiting Analysis
Published
Sep 29, 2026, 3:17 PM
Modified
Sep 30, 2026, 4:17 PM