CVE-2026-59943

Dompdf is an HTML to PDF converter for PHP. In versions 3.15 and prior, if a malicious actor can supply unrestricted content for rendering by Dompdf they can utilize the SVG rendering functionality to leak filesystem information when rendering PDF files using image references within a data-URI encoded SVG document. Using an <image> element inside a data-URI embedded SVG, an attacker can attempt to embed other files via the href or xlink:href attributes. When processing a file that does not exist (e.g. file:///DOESNOTEXIST), dompdf behaves differently than it does when accessing a file or directory that actually exists on the filesystem. This issue has been fixed in version 3.16.

• CWE-209

• https://github.com/dompdf/dompdf/commit/6a58996865db05d8fede748507e50ac4b8c5bfd0Patch
• https://github.com/dompdf/dompdf/releases/tag/v3.1.6Release Notes
• https://github.com/dompdf/dompdf/security/advisories/GHSA-j8qw-6jw8-r297Exploit, Third Party Advisory
• https://github.com/dompdf/dompdf/security/advisories/GHSA-j8qw-6jw8-r297Exploit, Third Party Advisory

Published

Jul 28, 2026

Last Modified

Aug 4, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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