CVE-2026-39880
Medium
Description
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 subscriptions and consume excessive traffic. This vulnerability is fixed in 2.7.5.
SeverityMedium
CVSS5.0
Exploit probability—
ProductRemnawave Backend
PublishedApr 8, 2026
First seenApr 8, 2026
Weakness typeCWE-362Race condition
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| remnawave remnawave_backend | v ≤ 2.7.4 | — |
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