CVE-2026-55890

{
  "id": "CVE-2026-55890",
  "sourceIdentifier": "[email protected]",
  "published": "2026-07-10T17:17:00.400",
  "lastModified": "2026-10-25T15:10:00.147",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Grav is a file-based Web platform. Prior to 2.0.0-rc.9, Grav's incomplete fix for stored XSS through the Markdown media attribute action (CVE-2026-42841) leaves the sibling MediaObjectTrait::style method reachable through the same Markdown excerpt-action pipeline, allowing an editor to save Markdown image style parameters that are written into the rendered img style attribute without sanitization. This issue is fixed in version 2.0.0-rc.9."
    },
    {
      "lang": "es",
      "value": "Grav es una plataforma web basada en archivos. Antes de la versión 2.0.0-rc.9, la solución incompleta de Grav para XSS almacenado a través de la acción del atributo de medios de Markdown (CVE-2026-42841) deja el método hermano MediaObjectTrait::style accesible a través de la misma canalización de acción de extracto de Markdown, permitiendo a un editor guardar parámetros de estilo de imagen de Markdown que se escriben en el atributo de estilo img renderizado sin sanitización. Este problema está solucionado en la versión 2.0.0-rc.9."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "getgrav",
          "product": "grav",
          "versions": [
            {
              "version": "< 2.0.0-rc.9",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N",
          "baseScore": 4.8,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "HIGH",
          "userInteraction": "REQUIRED",
          "scope": "CHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 1.7,
        "impactScore": 2.7
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-07-10T18:39:15.530035Z",
          "id": "CVE-2026-55890",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/getgrav/grav/commit/24fd6cbc438e12310b126d1176e7d7601203a6f2",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/getgrav/grav/releases/tag/2.0.0-rc.9",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/getgrav/grav/security/advisories/GHSA-pmf8-g7c8-7v54",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/getgrav/grav/security/advisories/GHSA-pmf8-g7c8-7v54",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ]
}