Is CVE-2026-49286 actively exploited?

No active exploitation of CVE-2026-49286 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-49286 be exploited remotely?

Yes. CVE-2026-49286 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-49286?

CVE-2026-49286 has a CVSS score of 8.1 (HIGH).

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HIGH

CVE-2026-49286

CWE-502Published: June 19, 2026· Updated: Jun 22, 2026

8.1

CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2026-49286 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.1.

From a weakness classification perspective (CWE-502): Insecure deserialization vulnerabilities allow attackers to inject malicious objects during deserialization, potentially enabling remote code execution.