Information Exposure Affecting dompdf/dompdf package, versions <3.1.6
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-PHP-DOMPDFDOMPDF-18306793
- published25 Jul 2026
- disclosed22 Jul 2026
- creditUnknown
Introduced: 22 Jul 2026
NewCVE-2026-55555 (opens in a new tab)How to fix?
Upgrade dompdf/dompdf to version 3.1.6 or higher.
Overview
Affected versions of this package are vulnerable to Information Exposure in the processing of CSS @font-face directives referencing local files via the file:// protocol. An attacker can determine the existence of sensitive files on the server by submitting crafted HTML and analyzing the application's response, such as memory exhaustion errors, which differ based on whether the targeted file exists. This is only exploitable if the attacker can supply unsanitized HTML input and system memory limits are configured in a way that allows observable differences in behavior.