CVE-2026-49286

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{"affected": [{"affectedData": [{"product": "php-weasyprint", "vendor": "pontedilana", "versions": [{"status": "affected", "version": "< 2.6.0"}]}], "source": "security-advisories@github.com"}], "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 \u2014 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 generaci\u00f3n de PDF desde una URL o una p\u00e1gina HTML. Antes de la versi\u00f3n 2.6.0, \u201cpontedilana/php-weasyprint\u201d proteg\u00eda el nombre de archivo de salida contra el stream wrapper \u201cphar://\u201d con una lista negra sensible a may\u00fasculas y min\u00fasculas. Los stream wrappers de PHP no distinguen entre may\u00fasculas y min\u00fasculas, por lo que \u201cPHAR://\u201d, \u201cPhar://\u201d, etc. eluden la verificaci\u00f3n y alcanzan \u201cfileExists()\u201d (\u201cfile_exists()\u201d) en \u201cprepareOutput()\u201d. En PHP 7 (que la biblioteca a\u00fan soporta - PHP 7.4+), esto desencadena la deserializaci\u00f3n de los metadatos de un archivo PHAR manipulado, lo que lleva a la ejecuci\u00f3n remota de c\u00f3digo. Este es el bypass del parche de CVE-2023-28115. El mismo problema y la misma soluci\u00f3n se gestionaron upstream en KnpLabs/snappy (GHSA-92rv-4j2h-8mjj). La versi\u00f3n 2.6.0 de PhpWeasyPrint contiene un parche para el problema."}], "id": "CVE-2026-49286", "lastModified": "2026-10-25T23:10:00.167", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 5.9, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-49286", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-06-22T14:22:36.863995Z", "version": "2.0.3"}}]}, "published": "2026-06-19T18:16:19.487", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/KnpLabs/snappy/security/advisories/GHSA-92rv-4j2h-8mjj"}, {"source": "security-advisories@github.com", "url": "https://github.com/pontedilana/php-weasyprint/commit/d1aa487722b5a3cab9b222b85fdb5608a5a550c3"}, {"source": "security-advisories@github.com", "url": "https://github.com/pontedilana/php-weasyprint/releases/tag/2.6.0"}, {"source": "security-advisories@github.com", "url": "https://github.com/pontedilana/php-weasyprint/security/advisories/GHSA-2fmj-p74r-3wjm"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/pontedilana/php-weasyprint/security/advisories/GHSA-2fmj-p74r-3wjm"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-502"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

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