CVE-2026-39880

Remnawave Backend has a race condition in HWID device limit allows bypassing max devices

MEDIUM
4.9
CVSS Score
Published: April 8, 2026 at 08:01 PM UTC
Updated: July 24, 2026 at 09:20 PM UTC
1 product affected across 1 vendorRemnawave Backend

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Severity
MEDIUM4.9
Exploit prediction
EPSS 0.2%
SSVC
PoC

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v ≤ 2.7.4
Affected range stops below 2.7.5, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (1)

x_refsource_CONFIRMExploitVendor Advisory
Source: cverecord
https://github.com/remnawave/backend/security/advisories/GHSA-985p-44h5-v3pq

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
HIGH
Privileges
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality
NONE
Integrity
LOW
Availability
LOW
Vector?

Quick Info

StatusANALYZED
CWE
CWE-362

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