CVE-2026-39880: CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') in remnawave backend
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.
AI Analysis
Technical Summary
This vulnerability (CWE-362) in the Remnawave backend arises from improper synchronization during HWID device registration. Authenticated users can exploit a race condition to exceed the allowed number of HWID devices, potentially leading to subscription abuse and resource overconsumption. The issue affects versions prior to 2.7.5 and is resolved in that release.
Potential Impact
An authenticated user can bypass device registration limits, allowing them to register more HWID devices than configured. This can result in unauthorized subscription reselling and excessive consumption of network traffic. There is no impact on confidentiality or availability reported. The vulnerability does not appear to be exploited in the wild at this time.
Mitigation Recommendations
Upgrade the Remnawave backend to version 2.7.5 or later, where this race condition vulnerability is fixed. Since no official patch link or advisory is provided, confirm the upgrade availability with the vendor or trusted sources before applying. Patch status is not explicitly confirmed beyond the version fix note; verify with vendor advisory for current remediation guidance.
CVE-2026-39880: CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') in remnawave backend
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.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-362) in the Remnawave backend arises from improper synchronization during HWID device registration. Authenticated users can exploit a race condition to exceed the allowed number of HWID devices, potentially leading to subscription abuse and resource overconsumption. The issue affects versions prior to 2.7.5 and is resolved in that release.
Potential Impact
An authenticated user can bypass device registration limits, allowing them to register more HWID devices than configured. This can result in unauthorized subscription reselling and excessive consumption of network traffic. There is no impact on confidentiality or availability reported. The vulnerability does not appear to be exploited in the wild at this time.
Mitigation Recommendations
Upgrade the Remnawave backend to version 2.7.5 or later, where this race condition vulnerability is fixed. Since no official patch link or advisory is provided, confirm the upgrade availability with the vendor or trusted sources before applying. Patch status is not explicitly confirmed beyond the version fix note; verify with vendor advisory for current remediation guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-07T20:32:03.010Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d6b51c1cc7ad14daaa5cf0
Added to database: 4/8/2026, 8:05:48 PM
Last enriched: 4/16/2026, 11:59:14 AM
Last updated: 5/24/2026, 12:29:24 PM
Views: 179
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