CVE-2026-50544: NortheBridge/luminalshine has Incorrect Permission Assignment for Critical Resource and Creation of Temporary File in Directory with Insecure Permissions
NortheBridge/luminalshine is a Sunshine-compatible game stream host for Moonlight. Prior to version 26.05.0-rc4, a latent gap exists on a default install, the file at src/platform/windows/misc.cpp lives at C:\ProgramData\LuminalShine\config\apps.json and is created by the SYSTEM service. Under Windows' default C:\ProgramData inheritance, that gives BUILTIN\Users only Read+Execute — not writable — so the canonical EoP doesn't actually trigger on a vanilla install. Version 26.05.0-rc4 contains a patch for the issue. As a workaround, use default condition DACLs for ProgramData.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
NortheBridge/luminalshineto a version that resolves this vulnerability.Fixed in 26.05.0-rc4 - Compensating control
As a workaround, use default condition DACLs for `ProgramData`.
Event History
Frequently Asked Questions
What is the severity of CVE-2026-50544?
The severity of CVE-2026-50544 is rated as medium with a score of 6.3.
How do I fix CVE-2026-50544?
To fix CVE-2026-50544, upgrade NortheBridge luminalshine to version 26.05.0-rc4 or later.
What type of vulnerability is CVE-2026-50544?
CVE-2026-50544 involves incorrect permission assignment for critical resources and the creation of temporary files in a directory with insecure permissions.
What are the implications of CVE-2026-50544?
CVE-2026-50544 could lead to elevated privileges and unauthorized access to critical resources within the system.
Which software is affected by CVE-2026-50544?
CVE-2026-50544 affects the NortheBridge luminalshine software prior to version 26.05.0-rc4.