CVE-2026-49359 PhpWeasyPrint vulnerable to SSRF and local file disclosure via the attachment option
Attackers can exploit the attachment option to perform Server-Side Request Forgery and read local files via PHP stream wrappers.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-49359?
CVE-2026-49359 is a medium-severity server-side request forgery vulnerability in pontedilana php-weasyprint, published on 19 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
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` 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.
Weakness: CWE-918
Which versions are affected by CVE-2026-49359?
2 open source packages ship an affected version, including pontedilana/php-weasyprint.
| Package | Affected | Fixed in |
|---|---|---|
pontedilana/php-weasyprint Packagist | All versions | 2.6.0 |
pontedilana/php-weasyprint Packagist | All versions | 2.6.0 |
How do I fix CVE-2026-49359?
Upgrade pontedilana/php-weasyprint to 2.6.0 or later.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-49359 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-49359 exists.
Sources
Also known as GHSA-x8g9-h984-pc36.