CVE-2026-39880

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.

CVSS v3 5.0 MEDIUM

5.0^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.1 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/remnawave/backend/security/advisories/GHSA-985p-44h5-v3pq	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:remnawave:remnawave_backend:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-04-08 20:16

Updated : 2026-07-24 21:10

NVD link : CVE-2026-39880

Mitre link : CVE-2026-39880

CVE.ORG link : CVE-2026-39880

JSON object : View

Products Affected

remnawave

remnawave_backend

CWE

CWE-362

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

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