CVE-2026-49286

{
  "id": "CVE-2026-49286",
  "sourceIdentifier": "[email protected]",
  "published": "2026-06-19T18:16:19.487",
  "lastModified": "2026-10-25T23:10:00.167",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "PhpWeasyPrint is a PHP library allowing PDF generation from a URL or an HTML page. Prior to version 2.6.0, `pontedilana/php-weasyprint` guarded the output filename against the `phar://` stream wrapper with a case-sensitive blacklist. PHP stream wrappers are case-insensitive, so `PHAR://`, `Phar://`, etc. bypass the check and reach `fileExists()` (`file_exists()`) in `prepareOutput()`. On PHP 7 (which the library still supports — PHP 7.4+), this triggers deserialization of a crafted PHAR archive's metadata, leading to remote code execution. This is the patch-bypass of CVE-2023-28115. The same issue and fix were handled upstream in KnpLabs/snappy (GHSA-92rv-4j2h-8mjj). PhpWeasyPrint version 2.6.0 contains a patch for the issue."
    },
    {
      "lang": "es",
      "value": "PhpWeasyPrint es una biblioteca PHP que permite la generación de PDF desde una URL o una página HTML. Antes de la versión 2.6.0, “pontedilana/php-weasyprint” protegía el nombre de archivo de salida contra el stream wrapper “phar://” con una lista negra sensible a mayúsculas y minúsculas. Los stream wrappers de PHP no distinguen entre mayúsculas y minúsculas, por lo que “PHAR://”, “Phar://”, etc. eluden la verificación y alcanzan “fileExists()” (“file_exists()”) en “prepareOutput()”. En PHP 7 (que la biblioteca aún soporta - PHP 7.4+), esto desencadena la deserialización de los metadatos de un archivo PHAR manipulado, lo que lleva a la ejecución remota de código. Este es el bypass del parche de CVE-2023-28115. El mismo problema y la misma solución se gestionaron upstream en KnpLabs/snappy (GHSA-92rv-4j2h-8mjj). La versión 2.6.0 de PhpWeasyPrint contiene un parche para el problema."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "pontedilana",
          "product": "php-weasyprint",
          "versions": [
            {
              "version": "< 2.6.0",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "baseScore": 8.1,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 5.9
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-06-22T14:22:36.863995Z",
          "id": "CVE-2026-49286",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-502"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/KnpLabs/snappy/security/advisories/GHSA-92rv-4j2h-8mjj",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/pontedilana/php-weasyprint/commit/d1aa487722b5a3cab9b222b85fdb5608a5a550c3",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/pontedilana/php-weasyprint/releases/tag/2.6.0",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/pontedilana/php-weasyprint/security/advisories/GHSA-2fmj-p74r-3wjm",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/pontedilana/php-weasyprint/security/advisories/GHSA-2fmj-p74r-3wjm",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ]
}