CVE-2026-66921

{
  "id": "CVE-2026-66921",
  "sourceIdentifier": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
  "published": "2026-07-28T14:16:40.367",
  "lastModified": "2026-10-24T13:10:00.147",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Pivotick’s Markdown node-reference renderer failed to HTML-escape the attacker-controlled nodeName value before interpolating it into both the data-node-name attribute and the body of a generated <span> element.\n\nBecause the node-reference tokenizer rejected only square brackets, a crafted node name could still contain quotation marks, angle brackets, or other HTML metacharacters. An attacker could therefore terminate the quoted attribute or inject additional HTML elements and event-handler attributes.\n\nWhen malicious node-reference content is rendered by a consumer that does not apply DOMPurify or equivalent sanitization, arbitrary JavaScript may execute in the victim’s browser in the security context of the application. Successful exploitation requires a victim to open or render a crafted graph or note and could allow the attacker to access same-origin information, modify displayed content, or perform actions using the victim’s session.\n\nThe patch resolves the issue by applying context-appropriate HTML escaping to node names before inserting them into either HTML text or quoted attribute values. The shared escaping function now encodes ampersands, angle brackets, and both types of quotation marks."
    },
    {
      "lang": "es",
      "value": "El renderizador de referencia de nodos Markdown de Pivotick no logró escapar en HTML el valor nodeName controlado por el atacante antes de interpolarlo tanto en el atributo data-node-name como en el cuerpo de un elemento [span] generado.\n\nDebido a que el tokenizador de referencia de nodos rechazaba solo corchetes, un nombre de nodo manipulado aún podía contener comillas, corchetes angulares u otros metacaracteres HTML. Un atacante podría, por lo tanto, terminar el atributo entre comillas o inyectar elementos HTML adicionales y atributos de gestor de eventos.\n\nCuando el contenido malicioso de referencia de nodos es renderizado por un consumidor que no aplica DOMPurify o una sanitización equivalente, JavaScript arbitrario puede ejecutarse en el navegador de la víctima en el contexto de seguridad de la aplicación. La explotación exitosa requiere que una víctima abra o renderice un gráfico o nota manipulado y podría permitir al atacante acceder a información del mismo origen, modificar el contenido mostrado o realizar acciones utilizando la sesión de la víctima.\n\nEl parche resuelve el problema aplicando un escape HTML apropiado al contexto a los nombres de nodo antes de insertarlos en texto HTML o valores de atributo entre comillas. La función de escape compartida ahora codifica ampersands, corchetes angulares y ambos tipos de comillas."
    }
  ],
  "affected": [
    {
      "source": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
      "affectedData": [
        {
          "vendor": "pivotick",
          "product": "pivotick",
          "defaultStatus": "unaffected",
          "repo": "https://github.com/Pivotick/Pivotick",
          "versions": [
            {
              "version": "0",
              "lessThanOrEqual": "1.4.0",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV40": [
      {
        "source": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
        "type": "Secondary",
        "cvssData": {
          "version": "4.0",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:H/SA:H/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": 6.3,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "privilegesRequired": "NONE",
          "userInteraction": "ACTIVE",
          "vulnConfidentialityImpact": "LOW",
          "vulnIntegrityImpact": "LOW",
          "vulnAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "HIGH",
          "subAvailabilityImpact": "HIGH",
          "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": "2026-07-28T14:18:36.415287Z",
          "id": "CVE-2026-66921",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/Pivotick/Pivotick/commit/4c13ff2b0ec769881b5526feddef37c0c5a08885",
      "source": "5a6e4751-2f3f-4070-9419-94fb35b644e8"
    }
  ]
}