CVE-2026-44646

{
  "id": "CVE-2026-44646",
  "sourceIdentifier": "[email protected]",
  "published": "2026-06-17T23:17:03.743",
  "lastModified": "2026-10-26T11:10:00.157",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "LiquidJS is a Shopify/GitHub Pages compatible template engine written in pure JavaScript. In versions 10.25.7 and below, Context.spawn() creates a child Context for the {% render %} tag but does not propagate the parent context's resolved ownPropertyOnly value, resulting in a silent bypass. The new context re-derives ownPropertyOnly from opts.ownPropertyOnly (the instance-level option), silently discarding any RenderOptions.ownPropertyOnly override that was supplied to parseAndRender(). As a result, a developer who runs a Liquid instance with the backwards-compatible ownPropertyOnly:false and then locks down an untrusted render with parseAndRender(..., { ownPropertyOnly: true }) still leaks prototype-chain properties from inside any {% render %} partial. This is a distinct exploit surface from the previously identified array-filter variants (where, reject, group_by, find, find_index, has) — the underlying root cause in Context.spawn() is shared, but {% render %} is a separately reachable sink that needs no filter usage. This issue has been fixed in version 10.26.0."
    },
    {
      "lang": "es",
      "value": "LiquidJS es un motor de plantillas compatible con Shopify/GitHub Pages escrito en JavaScript puro. En las versiones 10.25.7 e inferiores, Context.spawn() crea un Context hijo para la etiqueta {% render %} pero no propaga el valor ownPropertyOnly resuelto del contexto padre, lo que resulta en un bypass silencioso. El nuevo contexto vuelve a derivar ownPropertyOnly de opts.ownPropertyOnly (la opción a nivel de instancia), descartando silenciosamente cualquier anulación de RenderOptions.ownPropertyOnly que se haya proporcionado a parseAndRender(). Como resultado, un desarrollador que ejecuta una instancia de Liquid con la opción ownPropertyOnly:false compatible con versiones anteriores y luego restringe una renderización no confiable con parseAndRender(..., { ownPropertyOnly: true }) aún filtra propiedades de la cadena de prototipos desde dentro de cualquier parcial {% render %}. Esta es una superficie de exploit distinta de las variantes de filtro de array identificadas previamente (where, reject, group_by, find, find_index, has) - la causa raíz subyacente en Context.spawn() es compartida, pero {% render %} es un sumidero alcanzable por separado que no necesita el uso de filtros. Este problema ha sido solucionado en la versión 10.26.0."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "harttle",
          "product": "liquidjs",
          "versions": [
            {
              "version": "< 10.26.0",
              "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:L/I:N/A:N",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 1.4
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-06-18T13:45:29.819664Z",
          "id": "CVE-2026-44646",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-693"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/harttle/liquidjs/commit/dbbf6288030591bf6da28d8c1cce5a17bca97bb6",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/harttle/liquidjs/releases/tag/v10.26.0",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/harttle/liquidjs/security/advisories/GHSA-9x9p-qf8f-mvjg",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/harttle/liquidjs/security/advisories/GHSA-9x9p-qf8f-mvjg",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ]
}