FKIE_CVE-2026-39880

Vulnerability from fkie_nvd - Published: 2026-04-08 20:16 - Updated: 2026-07-24 21:10
Severity
5.0 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N
4.9 (Medium) - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:L
Summary
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.
References
security-advisories@github.comhttps://github.com/remnawave/backend/security/advisories/GHSA-985p-44h5-v3pqExploit, Vendor Advisory
Impacted products
Vendor Product Version
remnawave remnawave_backend *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "backend",
          "vendor": "remnawave",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 2.7.5"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:remnawave:remnawave_backend:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "50EC0CF7-868B-4DE4-8566-D7D9F11258C0",
              "versionEndIncluding": "2.7.4",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    },
    {
      "lang": "es",
      "value": "Remnawave Backend es el backend para la soluci\u00f3n de proxy y gesti\u00f3n de usuarios de Remnawave. Antes de la versi\u00f3n 2.7.5, un fallo en la l\u00f3gica de registro de dispositivos HWID permite a un usuario autenticado eludir el l\u00edmite configurado para dispositivos HWID y registrar m\u00e1s dispositivos de los esperados, lo que les permite revender suscripciones y consumir tr\u00e1fico excesivo. Esta vulnerabilidad est\u00e1 corregida en la versi\u00f3n 2.7.5."
    }
  ],
  "id": "CVE-2026-39880",
  "lastModified": "2026-07-24T21:10:00.143",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.0,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N",
          "version": "3.1"
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        "impactScore": 1.4,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 4.9,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 2.7,
        "source": "nvd@nist.gov",
        "type": "Primary"
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    "ssvcV203": [
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-39880",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-04-10T20:47:30.302993Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-04-08T20:16:26.850",
  "references": [
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      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "https://github.com/remnawave/backend/security/advisories/GHSA-985p-44h5-v3pq"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "description": [
        {
          "lang": "en",
          "value": "CWE-362"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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