CVE-2026-73649

{
  "id": "CVE-2026-73649",
  "sourceIdentifier": "[email protected]",
  "published": "2026-08-13T18:18:20.793",
  "lastModified": "2026-10-24T15:10:00.190",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Velocity.js is a JavaScript implementation of the Apache Velocity template engine. Prior to 2.1.7, the earlier fix for CVE-2026-44966 filtered constructor, __proto__, and prototype only in the #set assignment handler in src/compile/set.ts, while property-read expressions in src/compile/references.ts remained unfiltered. The getReferences() flow called getAttributes(), whose property access allowed an attacker-controlled template to traverse constructor.constructor to the JavaScript Function constructor. The #set handler validated only the assignment target and did not inspect the right-hand property-read expression, allowing arbitrary shell commands, environment-variable access, cloud-credential access, and internal-network access in the server process. This issue is fixed in version 2.1.7."
    },
    {
      "lang": "es",
      "value": "Velocity.js es una implementación de JavaScript del motor de plantillas Apache Velocity. Antes de la versión 2.1.7, la corrección anterior para CVE-2026-44966 filtraba constructor, __proto__ y prototype solo en el gestor de asignación #set en src/compile/set.ts, mientras que las expresiones de lectura de propiedades en src/compile/references.ts permanecían sin filtrar. El flujo de getReferences() llamaba a getAttributes(), cuyo acceso a propiedades permitía que una plantilla controlada por el atacante atravesara constructor.constructor hasta el constructor de funciones de JavaScript. El gestor #set validaba solo el objetivo de la asignación y no inspeccionaba la expresión de lectura de propiedades del lado derecho, permitiendo comandos de shell arbitrarios, acceso a variables de entorno, acceso a credenciales de la nube y acceso a la red interna en el proceso del servidor. Este problema está corregido en la versión 2.1.7."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "shepherdwind",
          "product": "velocity.js",
          "versions": [
            {
              "version": "< 2.1.7",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-08-14T16:42:05.530314Z",
          "id": "CVE-2026-73649",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-94"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/shepherdwind/velocity.js/commit/f8e47a6c4607249b9c967d3a1ced959b4dd64dba",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/shepherdwind/velocity.js/pull/192",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/shepherdwind/velocity.js/releases/tag/v2.1.7",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/shepherdwind/velocity.js/security/advisories/GHSA-7gfh-x38p-prh3",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/shepherdwind/velocity.js/security/advisories/GHSA-7gfh-x38p-prh3",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ]
}