FKIE_CVE-2026-76836

Vulnerability from fkie_nvd - Published: 2026-08-24 18:17 - Updated: 2026-10-13 09:10
Severity
8.8 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
AzuraCast exposes the Liquidsoap custom configuration fields through an endpoint that does not require the permission guarding them. The backend_config property in backend/src/Entity/Station.php is annotated with GROUP_GENERAL, and PUT /api/station/{station_id}/profile/edit in backend/src/Controller/Api/Stations/ProfileEditController.php deserializes with that group while requiring only StationPermissions::Profile. AbstractArrayEntity::fromArray() then assigns every public property with no field-level permission check, so custom_config_top, custom_config, custom_config_pre_playlists, custom_config_pre_live, custom_config_pre_fade and custom_config_bottom are writable through it. ConfigWriter::writeCustomConfigurationSection() emits those values verbatim into the generated Liquidsoap .liq script, where the process.run() and process.exec() built-ins execute operating system commands when the backend restarts, which the built-in sync task triggers automatically once needs_restart is set. The dedicated endpoint for the same data, PUT /api/station/{id}/liquidsoap-config, requires StationPermissions::Broadcasting, so a station manager holding only the profile permission reaches configuration that the intended boundary reserves for broadcasting operators.
References
disclosure@vulncheck.comhttps://github.com/AzuraCast/AzuraCast
disclosure@vulncheck.comhttps://github.com/AzuraCast/AzuraCast/blob/0.23.8/backend/src/Entity/Station.php
disclosure@vulncheck.comhttps://github.com/AzuraCast/AzuraCast/blob/0.23.8/backend/src/Radio/Backend/Liquidsoap/ConfigWriter.php
disclosure@vulncheck.comhttps://github.com/AzuraCast/AzuraCast/security/advisories/GHSA-q8wg-3qg7-8pc7
disclosure@vulncheck.comhttps://www.vulncheck.com/advisories/azuracast-through-liquidsoap-configuration-write-via-profile-edit-serialization-group-bypass
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/AzuraCast/AzuraCast/security/advisories/GHSA-q8wg-3qg7-8pc7
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "packageURL": "pkg:github/AzuraCast/AzuraCast",
          "product": "AzuraCast",
          "repo": "https://github.com/AzuraCast/AzuraCast",
          "vendor": "AzuraCast",
          "versions": [
            {
              "lessThanOrEqual": "0.23.8",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "disclosure@vulncheck.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "AzuraCast exposes the Liquidsoap custom configuration fields through an endpoint that does not require the permission guarding them. The backend_config property in backend/src/Entity/Station.php is annotated with GROUP_GENERAL, and PUT /api/station/{station_id}/profile/edit in backend/src/Controller/Api/Stations/ProfileEditController.php deserializes with that group while requiring only StationPermissions::Profile. AbstractArrayEntity::fromArray() then assigns every public property with no field-level permission check, so custom_config_top, custom_config, custom_config_pre_playlists, custom_config_pre_live, custom_config_pre_fade and custom_config_bottom are writable through it. ConfigWriter::writeCustomConfigurationSection() emits those values verbatim into the generated Liquidsoap .liq script, where the process.run() and process.exec() built-ins execute operating system commands when the backend restarts, which the built-in sync task triggers automatically once needs_restart is set. The dedicated endpoint for the same data, PUT /api/station/{id}/liquidsoap-config, requires StationPermissions::Broadcasting, so a station manager holding only the profile permission reaches configuration that the intended boundary reserves for broadcasting operators."
    },
    {
      "lang": "es",
      "value": "AzuraCast expone los campos de configuraci\u00f3n personalizados de Liquidsoap a trav\u00e9s de un endpoint que no requiere el permiso que los protege. La propiedad backend_config en backend/src/Entity/Station.php est\u00e1 anotada con GROUP_GENERAL, y PUT /API/station/{station_id}/profile/edit en backend/src/Controller/Api/Stations/ProfileEditController.php deserializa con ese grupo mientras que requiere solo StationPermissions::Profile. AbstractArrayEntity::fromArray() luego asigna cada propiedad p\u00fablica sin una verificaci\u00f3n de permiso a nivel de campo, por lo que custom_config_top, custom_config, custom_config_pre_playlists, custom_config_pre_live, custom_config_pre_fade y custom_config_bottom son escribibles a trav\u00e9s de \u00e9l. ConfigWriter::writeCustomConfigurationSection() emite esos valores textualmente en el script .liq de Liquidsoap generado, donde las funciones integradas process.run() y process.exec() ejecutan comandos del sistema operativo cuyo el backend se reinicia, lo cual la tarea de sincronizaci\u00f3n integrada activa autom\u00e1ticamente una vez que needs_restart est\u00e1 establecido. El endpoint dedicado para los mismos datos, PUT /API/station/{id}/liquidsoap-config, requiere StationPermissions::Broadcasting, por lo que un administrador de estaci\u00f3n que posee solo el permiso de perfil alcanza una configuraci\u00f3n que el l\u00edmite previsto reserva para operadores de transmisi\u00f3n."
    }
  ],
  "id": "CVE-2026-76836",
  "lastModified": "2026-10-13T09:10:00.323",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 5.9,
        "source": "disclosure@vulncheck.com",
        "type": "Secondary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 8.7,
          "baseSeverity": "HIGH",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "LOW",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/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",
          "version": "4.0",
          "vulnAvailabilityImpact": "HIGH",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "HIGH",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "disclosure@vulncheck.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-76836",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-24T19:58:47.846106Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-24T18:17:21.733",
  "references": [
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://github.com/AzuraCast/AzuraCast"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://github.com/AzuraCast/AzuraCast/blob/0.23.8/backend/src/Entity/Station.php"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://github.com/AzuraCast/AzuraCast/blob/0.23.8/backend/src/Radio/Backend/Liquidsoap/ConfigWriter.php"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://github.com/AzuraCast/AzuraCast/security/advisories/GHSA-q8wg-3qg7-8pc7"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://www.vulncheck.com/advisories/azuracast-through-liquidsoap-configuration-write-via-profile-edit-serialization-group-bypass"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://github.com/AzuraCast/AzuraCast/security/advisories/GHSA-q8wg-3qg7-8pc7"
    }
  ],
  "sourceIdentifier": "disclosure@vulncheck.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-94"
        },
        {
          "lang": "en",
          "value": "CWE-863"
        }
      ],
      "source": "disclosure@vulncheck.com",
      "type": "Secondary"
    }
  ]
}



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