CVE-2026-49358

PhpWeasyPrint vulnerable to arbitrary file deletion at shutdown via public $temporaryFiles

public array $temporaryFiles = [];

// ...

public function removeTemporaryFiles(): void
{
    foreach ($this->temporaryFiles as $file) {
        $this->unlink($file);
    }
}

<?php
use Pontedilana\PhpWeasyPrint\Pdf;

$pdf = new Pdf();
$pdf->temporaryFiles[] = '/var/www/html/.env';

// On shutdown, removeTemporaryFiles() deletes /var/www/html/.env.

• Arbitrary file deletion bound to script shutdown, scoped to the privileges of the PHP process user.
• Not directly exploitable on its own (the attacker already needs to influence the property in the same request). The risk is amplification: chained with a separate disclosure bug it enables leak-then-delete-to-cover-tracks, and any deserialization/property-oriented gadget that reaches this property becomes a generic file-delete primitive.

CWE-73 (External Control of File Name or Path).

CVE-2026-49358 has a CVSS score of 3.0 (Low). The vector is requires local access, high privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (2.6.0); upgrading removes the vulnerable code path.

Kodem intelligence

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Only delete files that actually live inside the temporary folder, comparing canonical (realpath) paths:

public function removeTemporaryFiles(): void
{
    $temporaryFolderPath = \realpath($this->getTemporaryFolder());
    if (false === $temporaryFolderPath) {
        return;
    }
    $temporaryFolderPath = \rtrim($temporaryFolderPath, \DIRECTORY_SEPARATOR) . \DIRECTORY_SEPARATOR;

    foreach ($this->temporaryFiles as $file) {
        $filePath = \realpath($file);
        if (false === $filePath || 0 !== \strncmp($filePath, $temporaryFolderPath, \strlen($temporaryFolderPath))) {
            continue;
        }
        $this->unlink($file);
    }
}

(The trailing directory separator prevents a sibling folder such as /tmpevil from matching /tmp; strncmp is used instead of str_starts_with to keep PHP 7.4 compatibility.)

1. What is CVE-2026-49358? CVE-2026-49358 is a low-severity security vulnerability in pontedilana/php-weasyprint (composer), affecting versions <= 2.5.1. It is fixed in 2.6.0.
2. How severe is CVE-2026-49358? CVE-2026-49358 has a CVSS score of 3.0 (Low). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
3. Which versions of pontedilana/php-weasyprint are affected by CVE-2026-49358? pontedilana/php-weasyprint (composer) versions <= 2.5.1 is affected.
4. Is there a fix for CVE-2026-49358? Yes. CVE-2026-49358 is fixed in 2.6.0. Upgrade to this version or later.
5. Is CVE-2026-49358 exploitable, and should I be worried? Whether CVE-2026-49358 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
6. What actually determines whether CVE-2026-49358 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
7. How do I fix CVE-2026-49358? Upgrade pontedilana/php-weasyprint to 2.6.0 or later.

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