TI-2026-65368 Aliases CVE-2026-102371 GHSA-j32v-fr72-w8fv

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

LOW 24CWE-214Published 2026-09-29 · Updated 2026-09-30

Key facts

Attack vector: Local
Privileges required: Low
User interaction: None
Attack complexity: Low
Attack requirements: Present
Impact type: —
Confidentiality · integrity · availability: High · None · None
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00108 1st percentileScored 2026-11-07

Fix Fixed Ubuntu Pro for WSL (Canonical): 0.1.19ubuntu2, 0.1.18~24.04.3, 0.1.18~22.04.2 +1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Canonical	Ubuntu Pro for WSL	0.1.1 to before 0.1.19ubuntu2; 0.1.1 to before 0.1.18~24.04.3; 0.1.1 to before 0.1.18~22.04.2; 0.1.1 to before 0.1.18~20.04.2	0.1.19ubuntu2, 0.1.18~24.04.3, 0.1.18~22.04.2, 0.1.18~20.04.2	Patch available	CNA

Ubuntu Pro for WSL VendorCanonical Affected 0.1.1 to before 0.1.19ubuntu2; 0.1.1 to before 0.1.18~24.04.3; 0.1.1 to before 0.1.18~22.04.2; 0.1.1 to before 0.1.18~20.04.2 Fixed in 0.1.19ubuntu2, 0.1.18~24.04.3, 0.1.18~22.04.2, 0.1.18~20.04.2 Patch available CNA

Remediation

Fix · CNA Ubuntu Pro for WSL (Canonical) Fixed in 0.1.19ubuntu2, 0.1.18~24.04.3, 0.1.18~22.04.2, 0.1.18~20.04.2

Timeline

2026-10-02 Threatist record created from CVE-2026-102371
2026-10-03 Alias added: GHSA-j32v-fr72-w8fv

References

Patch 2

Advisory 1

https://ubuntu.com/security/CVE-2026-102371

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Sources

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