CVE-2026-49286
Description
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.
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LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
pontedilana/php-weasyprintPackagist | < 2.6.0 | 2.6.0 |
Affected products
2- Range: <2.6.0
Patches
Vulnerability mechanics
References
6- github.com/advisories/GHSA-2fmj-p74r-3wjmghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-49286ghsaADVISORY
- github.com/KnpLabs/snappy/security/advisories/GHSA-92rv-4j2h-8mjjnvdWEB
- github.com/pontedilana/php-weasyprint/commit/d1aa487722b5a3cab9b222b85fdb5608a5a550c3nvdWEB
- github.com/pontedilana/php-weasyprint/releases/tag/2.6.0nvdWEB
- github.com/pontedilana/php-weasyprint/security/advisories/GHSA-2fmj-p74r-3wjmnvdWEB
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