CVE-2026-48083

{
  "id": "CVE-2026-48083",
  "sourceIdentifier": "[email protected]",
  "published": "2026-08-06T22:17:11.143",
  "lastModified": "2026-10-23T21:10:00.157",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "OpenReception's appointment booking software provides an end-to-end encrypted appointment booking platform. Prior to version 1.0.2, the `/api/log` endpoint accepts unauthenticated POST requests, applies no schema validation to the message body, writes attacker-controlled content directly into the application's stdout log, interprets newline characters as real line breaks, and enforces no size or rate limits. Three independent abuse modes follow: log injection (forge log lines that look like legitimate system events), log volume DoS (saturate the logging pipeline at sustained 100+ requests per second of small messages), and oversized-payload submission (100 KB payloads accepted; larger sizes not tested). The most operationally damaging mode is log injection. An attacker can inject lines that an operator scanning logs would mistake for real system errors, mask their own activity behind fake noise, or pollute SIEM alerting rules with crafted false positives. A line such as `[error]: injected admin error` injected from an unauthenticated source is indistinguishable from the application's own error output once written to disk. Version 1.0.2 fixes the issue."
    },
    {
      "lang": "es",
      "value": "El software de reserva de citas de OpenReception proporciona una plataforma de reserva de citas cifrada de extremo a extremo. Antes de la versión 1.0.2, el endpoint “/API/log” acepta solicitudes POST no autenticadas, no aplica validación de esquema al cuerpo del mensaje, escribe contenido controlado por el atacante directamente en el log stdout de la aplicación, interpreta los caracteres de nueva línea como saltos de línea reales y no impone límites de tamaño o de tasa. Se presentan tres modos de abuso independientes: inyección de logs (falsificar líneas de log que parecen eventos legítimos del sistema), DoS por volumen de logs (saturar la tubería de logging con más de 100 solicitudes por segundo de mensajes pequeños de forma sostenida) y envío de payloads sobredimensionados (se aceptan payloads de 100 KB; tamaños mayores no probados). El modo más perjudicial operativamente es la inyección de logs. Un atacante puede inyectar líneas que un operador que escanea los logs confundiría con errores reales del sistema, enmascarar su propia actividad detrás de ruido falso o contaminar las reglas de alerta de SIEM con falsos positivos elaborados. Una línea como ’[error]: injected admin error’ inyectada desde una fuente no autenticada es indistinguible de la propia salida de error de la aplicación una vez escrita en el disco. La versión 1.0.2 soluciona el problema."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "open-reception",
          "product": "appointment-booking-software",
          "versions": [
            {
              "version": "< 1.0.2",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "availabilityImpact": "LOW"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 2.5
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-08-08T02:41:23.087767Z",
          "id": "CVE-2026-48083",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-117"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/open-reception/appointment-booking-software/commit/36104d21ee0b6616f1c10273ec9970a27cb56b57",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/open-reception/appointment-booking-software/security/advisories/GHSA-fw48-38r5-7ffj",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/open-reception/appointment-booking-software/security/advisories/GHSA-fw48-38r5-7ffj",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ]
}