CVE-2026-41687

{
  "id": "CVE-2026-41687",
  "sourceIdentifier": "[email protected]",
  "published": "2026-05-07T15:16:09.107",
  "lastModified": "2026-10-26T20:10:00.160",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Wallos is an open-source, self-hostable personal subscription tracker. Prior to version 4.8.1, the SSRF protection in endpoints/subscription/add.php (line 42) and endpoints/payments/add.php (line 40) uses an inline IP validation check (FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE) that does not block CGNAT addresses (100.64.0.0/10, RFC 6598). The includes/ssrf_helper.php file explicitly defines is_cgnat_ip() to cover this gap (used by notification endpoints), but the logo/icon URL fetching in subscription and payment endpoints performs its own inline validation that misses this range. This allows authenticated users to perform Blind SSRF to internal services in Tailscale, Carrier-Grade NAT, and other environments using 100.64.0.0/10 addresses. This issue has been patched in version 4.8.1."
    },
    {
      "lang": "es",
      "value": "Wallos es un rastreador personal de suscripciones de código abierto y autoalojable. Antes de la versión 4.8.1, la protección SSRF en endpoints/subscription/add.php (línea 42) y endpoints/payments/add.php (línea 40) utiliza una verificación de validación de IP en línea (FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE) que no bloquea las direcciones CGNAT (100.64.0.0/10, RFC 6598). El archivo includes/ssrf_helper.php define explícitamente is_cgnat_ip() para cubrir esta brecha (utilizado por los endpoints de notificación), pero la obtención de URL de logotipos/iconos en los endpoints de suscripción y pago realiza su propia validación en línea que omite este rango. Esto permite a usuarios autenticados realizar SSRF Ciego a servicios internos en Tailscale, NAT de Grado de Operador y otros entornos que utilizan direcciones 100.64.0.0/10. Este problema ha sido parcheado en la versión 4.8.1."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "ellite",
          "product": "Wallos",
          "versions": [
            {
              "version": "< 4.8.1",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
          "baseScore": 4.3,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 1.4
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-05-07T14:56:20.647203Z",
          "id": "CVE-2026-41687",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-918"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/ellite/Wallos/commit/e79f28be6be0435fbc93563fb3c0e62206b48e85",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/ellite/Wallos/releases/tag/v4.8.1",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/ellite/Wallos/security/advisories/GHSA-4v59-hghw-7gc2",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/ellite/Wallos/security/advisories/GHSA-4v59-hghw-7gc2",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ]
}