PT-2026-50999 · Pontedilana · Php-Weasyprint

Rémi Matasse · Published 2026-06-19 · Updated 2026-06-19 · CVE-2026-49286

Mitre

CVSS v3.1

8.1

High

Base vector

AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

Fix

Deserialization of Untrusted Data

Weakness Enumeration

CWE-502

Related Identifiers

CVE-2026-49286

Affected Products

Php-Weasyprint

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-49286 · Security Note
• https://github.com/KnpLabs/snappy/security/advisories/GHSA-92rv-4j2h-8mjj · Note
• https://github.com/pontedilana/php-weasyprint/security/advisories/GHSA-2fmj-p74r-3wjm · Note
• https://github.com/pontedilana/php-weasyprint/commit/d1aa487722b5a3cab9b222b85fdb5608a5a550c3 · Note
• https://github.com/pontedilana/php-weasyprint/releases/tag/2.6.0 · Note