CVE-2026-39880 Remnawave Backend has a race condition in HWID device limit allows bypassing max devices

Remnawave Backend is the backend for the Remnawave proxy and user management solution. Prior to 2.7.5, a glitch in the HWID device registration logic allows an authenticated user to bypass the configured limit for HWID devices and register more devices than expected, allowing them to resell...

CVE-2026-39880

Remnawave Backend vulnerability CVE-2026-39880 affects the Remnawave Backend (HWID device registration logic). Before version 2.7.5, an authenticated user can bypass the HWID device limit and register more devices, enabling subscription resales and excessive traffic. Root cause: a race condition ...