CVE-2026-48007

{
  "id": "CVE-2026-48007",
  "sourceIdentifier": "[email protected]",
  "published": "2026-08-07T20:16:51.573",
  "lastModified": "2026-10-23T20:10:00.160",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Element Call is a native Matrix video conferencing application. Versions 0.5.17 through 0.19.3 report analytics data to a PostHog server, when configured to by a `posthog` key in config.json or by the `posthogApiHost` and `posthogApiKey` URL parameters. Several fields of this data (`$initial_person_info`, `$session_entry_url`, and `$current_url`) were found to contain the full URL of the user's visited page, including the fragment. Users of a standalone Element Call ‘SPA’ instance such as https://call.element.io may therefore have reported the full URLs of certain calls, including encryption passwords, to the configured PostHog server, potentially compromising the confidentiality of the calls to actors who could access both the PostHog analytics data and the encrypted media streams. The same issue is present in Element Call's embedded package, but in practice it does not impact applications using this package (including Element Web, Element Desktop, Element X iOS, and Element X Android) because they distribute encryption keys over Matrix rather than encoding a password in the URL. The issue is patched in Element Call 0.19.4. Some workarounds are available. Users may opt out of analytics in the 'Feedback' tab of Element Call's settings and create new links for future calls. Admins who host Element Call as a standalone application may disable PostHog analytics entirely by removing the `posthog` key from their deployment's config.json file."
    },
    {
      "lang": "es",
      "value": "Element Call es una aplicación nativa de videoconferencia de Matrix. Las versiones 0.5.17 a 0.19.3 informan datos analíticos a un servidor PostHog, cuando se configuran mediante una clave “posthog” en config.json o mediante los parámetros URL “posthogApiHost” y “posthogApiKey”. Se encontró que varios campos de estos datos (“$initial_person_info”, “$session_entry_url” y “$current_url”) contenían la URL completa de la página visitada por el usuario, incluyendo el fragmento. Los usuarios de una instancia ‘SPA’ independiente de Element Call como HTTPS://call.element.io, por lo tanto, pueden haber informado las URL completas de ciertas llamadas, incluyendo contraseñas de cifrado, al servidor PostHog configurado, comprometiendo potencialmente la confidencialidad de las llamadas a actores que pudieran acceder tanto a los datos analíticos de PostHog como a los flujos de medios cifrados. El mismo problema está presente en el paquete incrustado de Element Call, pero en la práctica no impacta a las aplicaciones que usan este paquete (incluyendo Element Web, Element Desktop, Element X iOS y Element X Android) porque distribuyen claves de cifrado a través de Matrix en lugar de codificar una contraseña en la URL. El problema está parcheado en Element Call 0.19.4. Algunas soluciones provisionales están disponibles. Los usuarios pueden optar por no participar en el análisis en la pestaña ’Feedback’ de la configuración de Element Call y crear nuevos enlaces para futuras llamadas. Los administradores que alojan Element Call como una aplicación independiente pueden deshabilitar completamente el análisis de PostHog eliminando la clave “posthog” del archivo config.json de su implementación."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "element-hq",
          "product": "element-call",
          "versions": [
            {
              "version": ">= 0.5.17, < 0.19.4",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV40": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "4.0",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "baseScore": 8.6,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "HIGH",
          "vulnAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "subAvailabilityImpact": "NONE",
          "exploitMaturity": "NOT_DEFINED",
          "confidentialityRequirement": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "valueDensity": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "providerUrgency": "NOT_DEFINED"
        }
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-08-10T13:27:21.640131Z",
          "id": "CVE-2026-48007",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-200"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/element-hq/element-call/releases/tag/v0.19.4",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/element-hq/element-call/security/advisories/GHSA-6vhh-4xw6-h2h2",
      "source": "[email protected]"
    }
  ]
}