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CVE-2026-56722

5.3 · MEDIUM

Dompdf is an HTML to PDF converter for PHP.

Published Jul 28, 2026CWE-20EPSS 0.45%

Overview

CVE-2026-56722 is a medium-severity vulnerability. It was published on July 28, 2026 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Dompdf is an HTML to PDF converter for PHP. In versions 3.15 and prior, aAn attacker who controls the HTML input can bypass this restriction by embedding a target file path inside an SVG image delivered through a  data:  URI, because dompdf processes the SVG twice and the second pass does not enforce the same protections as the first. When rendering, dompdf hands the SVG to the separate  php-svg-lib  library with external references forced on, and that library has no knowledge of the chroot directory, blocks only the  phar://  scheme, and ultimately reads the referenced file with no path or protocol validation. This lets an external, unauthenticated attacker read arbitrary image files from the server's file system in the default configuration. This issue has been fixed in version 3.16.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/dompdf/dompdf/commit/6a58996865db05d8fede748507e50ac4b8c5bfd0GitHubgithub.com/dompdf/dompdf/commit/bf7b02f642e26007dedc5a22b3d6e15f9931120aGitHubgithub.com/dompdf/dompdf/releases/tag/v3.1.6GitHubgithub.com/dompdf/dompdf/security/advisories/GHSA-cx96-42px-69fmGitHubgithub.com/dompdf/dompdf/security/advisories/GHSA-cx96-42px-69fm

How CyberStrike helps

Frequently asked questions

What is CVE-2026-56722?

CVE-2026-56722 is a medium-severity vulnerability. It was published on July 28, 2026 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2026-56722?

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-56722?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-56722?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-56722 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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