FKIE_CVE-2026-55890

Vulnerability from fkie_nvd - Published: 2026-07-10 17:17 - Updated: 2026-10-25 15:10
Severity
4.8 (Medium) - CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Summary
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.
References
security-advisories@github.comhttps://github.com/getgrav/grav/commit/24fd6cbc438e12310b126d1176e7d7601203a6f2
security-advisories@github.comhttps://github.com/getgrav/grav/releases/tag/2.0.0-rc.9
security-advisories@github.comhttps://github.com/getgrav/grav/security/advisories/GHSA-pmf8-g7c8-7v54
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/getgrav/grav/security/advisories/GHSA-pmf8-g7c8-7v54
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "grav",
          "vendor": "getgrav",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 2.0.0-rc.9"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Grav is a file-based Web platform. Prior to 2.0.0-rc.9, Grav\u0027s 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 versi\u00f3n 2.0.0-rc.9, la soluci\u00f3n incompleta de Grav para XSS almacenado a trav\u00e9s de la acci\u00f3n del atributo de medios de Markdown (CVE-2026-42841) deja el m\u00e9todo hermano MediaObjectTrait::style accesible a trav\u00e9s de la misma canalizaci\u00f3n de acci\u00f3n de extracto de Markdown, permitiendo a un editor guardar par\u00e1metros de estilo de imagen de Markdown que se escriben en el atributo de estilo img renderizado sin sanitizaci\u00f3n. Este problema est\u00e1 solucionado en la versi\u00f3n 2.0.0-rc.9."
    }
  ],
  "id": "CVE-2026-55890",
  "lastModified": "2026-10-25T15:10:00.147",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 4.8,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "HIGH",
          "scope": "CHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 1.7,
        "impactScore": 2.7,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-55890",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-07-10T18:39:15.530035Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-07-10T17:17:00.400",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/getgrav/grav/commit/24fd6cbc438e12310b126d1176e7d7601203a6f2"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/getgrav/grav/releases/tag/2.0.0-rc.9"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/getgrav/grav/security/advisories/GHSA-pmf8-g7c8-7v54"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://github.com/getgrav/grav/security/advisories/GHSA-pmf8-g7c8-7v54"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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