CVE-2026-102371wsl-pro-service: Ubuntu Pro token exposed via process command-line arguments
Updated under an hour ago ()
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It affects Canonical Ubuntu Pro for WSL. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 5.7 MEDIUM (v4.0, CNA)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
- Weakness (CWE)
- CWE-214
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- canonical
- NVD analysis
- Awaiting Analysis
- Record last updated
- Sep 30, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Canonical Ubuntu Pro for WSL canonical:ubuntu_pro_for_wsl (from the name) | from 0.1.1 before 0.1.19ubuntu2; from 0.1.1 before 0.1.18~24.04.3; from 0.1.1 before 0.1.18~22.04.2; from 0.1.1 before 0.1.18~20.04.2 | CNA record |
References
- https://github.com/canonical/ubuntu-pro-for-wsl/pull/1816patch
- https://github.com/canonical/ubuntu-pro-for-wsl/commit/11c164a37b806bcf2a2304beb0d65e406739778bpatch
- https://ubuntu.com/security/CVE-2026-102371vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.