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CVE-2026-29905

Estado: AnalizadaMedia (6.5)—

Kirby CMS through 5.1.4 allows an authenticated user with 'Editor' permissions to cause a persistent Denial of Service (DoS) via a malformed image upload. The application fails to properly validate the return value of the PHP getimagesize() function. When the system attempts to process this file for metadata or thumbnail generation, it triggers a fatal TypeError.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Getkirby — Kirby

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-29905",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-29905",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-03-26T18:28:04.871948Z"
        }
      }
    ],
    "cvssMetricV31": [
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        "cvssData": {
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
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  },
  "affected": [
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      "affectedData": [
        {
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          "versions": [
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              "status": "affected",
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  "published": "2026-03-26T17:16:34.660",
  "references": [
    {
      "url": "https://drive.google.com/file/d/1MwvvSYIwnC8kOIzjycGMQZw4d2K2ef8h/view?usp=sharing",
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      "description": [
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          "value": "CWE-20"
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          "value": "CWE-252"
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  ],
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      "lang": "en",
      "value": "Kirby CMS through 5.1.4 allows an authenticated user with 'Editor' permissions to cause a persistent Denial of Service (DoS) via a malformed image upload. The application fails to properly validate the return value of the PHP getimagesize() function. When the system attempts to process this file for metadata or thumbnail generation, it triggers a fatal TypeError."
    },
    {
      "lang": "es",
      "value": "Kirby CMS hasta 5.1.4 permite a un usuario autenticado con permisos de 'Editor' causar una denegación de servicio (DoS) persistente mediante la carga de una imagen malformada. La aplicación no valida correctamente el valor de retorno de la función PHP getimagesize(). Cuando el sistema intenta procesar este archivo para la generación de metadatos o miniaturas, desencadena un TypeError fatal."
    }
  ],
  "lastModified": "2026-06-17T10:29:55.900",
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  "sourceIdentifier": "cve@mitre.org"
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