CVE-2026-50544: Northebridge Luminalshine

Medium severity, CVSS 6.3. EPSS: 0.1% chance of exploitation in the next 30 days.

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 products

• Northebridge Luminalshine: before 26.05.0-rc4 (fixed in 26.05.0-rc4)

Published 2026-08-13. Last modified 2026-09-09.