CVE-2026-45617

{
  "id": "CVE-2026-45617",
  "sourceIdentifier": "[email protected]",
  "published": "2026-06-17T23:17:04.033",
  "lastModified": "2026-10-25T23:10:00.167",
  "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, the built-in strip_html filter uses a regex containing four flawed lazy-quantified alternatives, leading to ReDoS via quadratic backtracking. When the input contains many <script, <style, or <!-- opener tokens without matching closers, the V8 regex engine performs O(N²) backtracking, blocking the Node.js event loop. A single ~350 KB request ('<script'.repeat(50000)) stalls the process for ~10 seconds; cost grows quadratically with input size. The default memoryLimit: Infinity does not bound regex CPU, and even when configured strip_html only charges str.length to the limit — the regex itself runs unbounded.  A single unauthenticated request containing crafted untrusted input can cause severe event-loop blocking and CPU amplification that saturates Node.js workers while bypassing memoryLimit protections. 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, el filtro incorporado strip_html utiliza una expresión regular (regex) que contiene cuatro alternativas cuantificadas perezosamente defectuosas, lo que lleva a ReDoS a través de retroceso cuadrático. Cuando la entrada contiene muchos tokens de apertura <script, <style o  [comment]  sin sus cierres correspondientes, el motor de expresiones regulares V8 realiza un retroceso O(N²), bloqueando el bucle de eventos de Node.js. Una única solicitud de ~350 KB (’<script’.repeat(50000)) detiene el proceso durante ~10 segundos; el costo crece cuadráticamente con el tamaño de la entrada. El memoryLimit: Infinity predeterminado no limita la CPU de la expresión regular, e incluso cuando está configurado, strip_html solo carga str.length al límite - la expresión regular en sí se ejecuta sin límites. Una única solicitud no autenticada que contenga una entrada no confiable manipulada puede causar un bloqueo severo del bucle de eventos y una amplificación de la CPU que satura los trabajadores de Node.js mientras elude las protecciones de memoryLimit. 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:N/I:N/A:H",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-06-18T15:46:01.767622Z",
          "id": "CVE-2026-45617",
          "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-1333"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/harttle/liquidjs/commit/3616a744b9abeb425c217b340a2397d46176afb8",
      "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-r7g9-xpmj-5fcq",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/harttle/liquidjs/security/advisories/GHSA-r7g9-xpmj-5fcq",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ]
}