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CVE-2026-49286

CVE-2026-49286 · PhpWeasyPrint vulnerable to PHAR deserialization via output filename (CVE-2023-28115 case-insensitive bypass)

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 8.1 · High · EPSS 0.7% · Fix available

Published
Updated

Stack: php

Affected products and versions

  • php-weasyprint

    Versions
    • < 2.6.0: Affected

    No fix published

  • pontedilana/php-weasyprint Packagist

    Versions
    • 0.10.0
    • 0.10.1
    • 0.11.0
    • 0.12.0
    • 0.13.0
    • 0.9.0
    • 1.0.0
    • 1.0.1
    • 1.1.0
    • 1.1.1
    • 1.2.0
    • 1.3.0
    • 1.4.0
    • 1.5.0
    • 2.0.0
    • 2.1.0
    • 2.2.0
    • 2.3.0
    • 2.4.0
    • 2.5.0
    • 2.5.1
    Affected ranges
    • ECOSYSTEM: < 2.6.0

    Update to 2.6.0

Original sources

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