FKIE_CVE-2026-17033

Vulnerability from fkie_nvd - Published: 2026-08-24 14:16 - Updated: 2026-10-12 15:10
Severity
6.8 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:L
Summary
An authenticated attacker with Editor access or alert.instances.external:write can submit an external Alertmanager alert containing a controlled generatorURL. The attacker is authorized to create the alert, but not to execute script in another user's Grafana session. Grafana renders alert.generatorURL directly as the Alert Details See source LinkButton href without URL-scheme sanitization or a safe-protocol allowlist. The click interceptor's :// heuristic can be bypassed by placing :// inside a JavaScript comment. When a user with read access clicks See source, the browser executes attacker-controlled JavaScript in the Grafana origin with the clicking user's permissions.
References
security@grafana.comhttps://grafana.com/security/security-advisories/cve-2026-17033
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Grafana OSS",
          "vendor": "Grafana",
          "versions": [
            {
              "lessThanOrEqual": "12.3.11",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "12.4.9",
              "status": "affected",
              "version": "12.4.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "13.0.7",
              "status": "affected",
              "version": "13.0.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "security@grafana.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "An authenticated attacker with Editor access or alert.instances.external:write can submit an external Alertmanager alert containing a controlled generatorURL. The attacker is authorized to create the alert, but not to execute script in another user\u0027s Grafana session.\n\nGrafana renders alert.generatorURL directly as the Alert Details See source LinkButton href without URL-scheme sanitization or a safe-protocol allowlist. The click interceptor\u0027s :// heuristic can be bypassed by placing :// inside a JavaScript comment. When a user with read access clicks See source, the browser executes attacker-controlled JavaScript in the Grafana origin with the clicking user\u0027s permissions."
    },
    {
      "lang": "es",
      "value": "Un atacante autenticado con acceso de Editor o alert.instances.external:write puede enviar una alerta externa de Alertmanager que contiene una generatorURL controlada. El atacante est\u00e1 autorizado para crear la alerta, pero no para ejecutar scripts en la sesi\u00f3n de Grafana de otro usuario.\n\nGrafana renderiza alert.generatorURL directamente como el href del bot\u00f3n de enlace \u0027Ver origen\u0027 de los detalles de la alerta sin saneamiento del esquema de URL ni una lista de permitidos de protocolos seguros. La heur\u00edstica :// del interceptor de clics puede ser eludida colocando :// dentro de un comentario de JavaScript. Cuando un usuario con acceso de lectura hace clic en \u0027Ver origen\u0027, el navegador ejecuta JavaScript controlado por el atacante en el origen de Grafana con los permisos del usuario que hace clic."
    }
  ],
  "id": "CVE-2026-17033",
  "lastModified": "2026-10-12T15:10:00.207",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 6.8,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "LOW",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 2.1,
        "impactScore": 4.7,
        "source": "security@grafana.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-17033",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-24T15:10:56.482893Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-24T14:16:50.717",
  "references": [
    {
      "source": "security@grafana.com",
      "url": "https://grafana.com/security/security-advisories/cve-2026-17033"
    }
  ],
  "sourceIdentifier": "security@grafana.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ],
      "source": "security@grafana.com",
      "type": "Secondary"
    }
  ]
}



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