pontedilana php-weasyprint up to 2.5.x file_get_contents server-side request forgery

Summaryinfo

A vulnerability, which was classified as critical, has been found in pontedilana php-weasyprint up to 2.5.x. This affects the function file_get_contents. This manipulation causes server-side request forgery. This vulnerability is tracked as CVE-2026-49359. The attack is possible to be carried out remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in pontedilana php-weasyprint up to 2.5.x. Affected by this vulnerability is the function file_get_contents. The manipulation with an unknown input leads to a server-side request forgery vulnerability. The CWE definition for the vulnerability is CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

PhpWeasyPrint is a PHP library allowing PDF generation from a URL or an HTML page. Prior to version 2.6.0, `pontedilana/php-weasyprint` fetches the content of option values server-side via `file_get_contents()` when the value looks like a URL, without restricting the URL scheme. The `attachment` option of `Pdf` is the reachable sink: any value that passes `isOptionUrl()` (`filter_var(..., FILTER_VALIDATE_URL)`) is downloaded by the PHP process and embedded into the generated PDF. Because `FILTER_VALIDATE_URL` accepts `http`, `https`, `ftp`, `file` and PHP stream wrappers such as `php://`, an attacker who can influence the `attachment` value reaches both a **Server-Side Request Forgery** primitive (e.g. internal HTTP endpoints, cloud metadata) and a local file disclosure primitive (`file://`, `php://filter/...`), with the fetched bytes exfiltrated as a PDF attachment. This is the same class of issue KnpLabs/snappy patched for its `xsl-style-sheet` option in GHSA-c5fp-p67m-gq56. The library is documented as a one-to-one substitute for KnpLabs/snappy and shares the same code shape. PhpWeasyPrint version 2.6.0 contains a patch for the issue.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-49359 since 05/29/2026. The exploitation appears to be easy. The attack can be launched remotely. Technical details are known, but no exploit is available.

Upgrading to version 2.6.0 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 9582dcf119a405276cf55e9e10bc577a887792cb is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Programming Language Software

Vendor

• pontedilana

Name

• php-weasyprint

Version

• 2.0
• 2.1
• 2.2
• 2.3
• 2.4
• 2.5

License

• open-source

Website

• Product: https://github.com/pontedilana/php-weasyprint/

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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