CVE-2026-61448

{
  "id": "CVE-2026-61448",
  "sourceIdentifier": "[email protected]",
  "published": "2026-07-11T14:16:23.510",
  "lastModified": "2026-10-24T13:10:00.147",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Parse Server is affected by a stored cross-site scripting (XSS) vulnerability in versions >= 9.0.0, < 9.10.0-alpha.2 and <= 8.6.83. When an uploaded file's extension is not recognized by the mime package, Parse Server preserves the client-supplied Content-Type. A malformed Content-Type that is not a valid type/subtype media type (e.g., 'image', 'image/', or 'image//svg+xml') bypasses the fileUpload.fileExtensions blocklist and is stored unchanged. On storage adapters that persist and serve the uploaded Content-Type (such as Amazon S3, Google Cloud Storage, or Azure Blob Storage), a browser cannot parse the malformed value and falls back to MIME-sniffing; a file whose body begins with HTML is rendered as HTML, executing embedded script in the application's origin against other users who open the file URL. The default GridFS storage adapter is not affected. Fixed in 9.10.0-alpha.2 and 8.6.84."
    },
    {
      "lang": "es",
      "value": "Parse Server se ve afectado por una vulnerabilidad de cross-site scripting (XSS) almacenado en las versiones >= 9.0.0, anterior a 9.10.0-alpha.2 y menor o igual que 8.6.83. Cuando la extensión de un archivo subido no es reconocida por el paquete mime, Parse Server conserva el Content-Type proporcionado por el cliente. Un Content-Type malformado que no es un tipo de medio tipo/subtipo válido (p. ej., 'image', 'image/', o 'image//svg+xml') elude la lista de bloqueo fileUpload.fileExtensions y se almacena sin cambios. En los adaptadores de almacenamiento que persisten y sirven el Content-Type subido (como Amazon S3, Google Cloud Storage o Azure Blob Storage), un navegador no puede analizar el valor malformado y recurre al MIME-sniffing; un archivo cuyo cuerpo comienza con HTML se renderiza como HTML, ejecutando scripts incrustados en el origen de la aplicación contra otros usuarios que abren la URL del archivo. El adaptador de almacenamiento GridFS predeterminado no se ve afectado. Corregido en 9.10.0-alpha.2 y 8.6.84."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "parse-community",
          "product": "parse-server",
          "defaultStatus": "unaffected",
          "packageURL": "pkg:npm/parse-server",
          "versions": [
            {
              "version": "9.0.0",
              "lessThan": "9.10.0-alpha.2",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "9.10.0-alpha.2",
              "versionType": "semver",
              "status": "unaffected"
            }
          ]
        },
        {
          "vendor": "parse-community",
          "product": "parse-server",
          "defaultStatus": "unaffected",
          "packageURL": "pkg:npm/parse-server",
          "versions": [
            {
              "version": "0",
              "lessThan": "8.6.84",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "8.6.84",
              "versionType": "semver",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV40": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "4.0",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:L/VA:N/SC:L/SI:L/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": 2.1,
          "baseSeverity": "LOW",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "attackRequirements": "PRESENT",
          "privilegesRequired": "LOW",
          "userInteraction": "PASSIVE",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "LOW",
          "vulnAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "LOW",
          "subIntegrityImpact": "LOW",
          "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": "2026-07-13T16:09:47.693724Z",
          "id": "CVE-2026-61448",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-434"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/parse-community/parse-server/security/advisories/GHSA-r899-h629-j84r",
      "source": "[email protected]"
    },
    {
      "url": "https://www.vulncheck.com/advisories/parse-server-stored-xss-via-malformed-content-type",
      "source": "[email protected]"
    }
  ]
}