CVE-2026-59943: Dompdf is an HTML to PDF converter for PHP

Q: How do I fix CVE-2026-59943?

dompdf: upgrade to 3.1.6. Exact commands for each OS are on this page.

Q: Is CVE-2026-59943 being exploited?

CVE-2026-59943 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-59943 affect?

CVE-2026-59943 affects dompdf. Severity is medium (CVSS 5.3). 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 render

Q: How urgent is CVE-2026-59943?

Priority 38/100. Public exploit reference; Remotely exploitable, no login, no user action

This week

MEDIUM 5.3REMOTEUPGRADE

CVE-2026-59943 is a medium-severity flaw (CVSS 5.3) affecting dompdf. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 attr

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 64%)
CISA exploited list	No
Weakness	CWE-209
Published	2026-07-28
Last modified	2026-08-04

Publisher (CNA): GitHub, Inc. · Vendor: dompdf project

Last updated 2026-08-04 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-28 21:17 UTCPublished CVE record published
2026-08-04 15:21 UTCUpdated Record last modified

dompdf project dompdf UPGRADE

Affected: < 3.1.6

Fixed in: 3.1.6

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy dompdf || rpm -q dompdf || dompdf --version

2. UPGRADE to 3.1.6 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade dompdf

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade dompdf

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-59943?

dompdf: upgrade to 3.1.6. Exact commands for each OS are on this page.

Is CVE-2026-59943 being exploited?

CVE-2026-59943 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-59943 affect?

CVE-2026-59943 affects dompdf. Severity is medium (CVSS 5.3). 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 render

How urgent is CVE-2026-59943?

Priority 38/100. Public exploit reference; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

Related CVEs

CVE-2026-55554 HIGH 7.5 UPGRADE Dompdf is an HTML to PDF converter for PHP
CVE-2026-55555 HIGH 7.5 UPGRADE Dompdf is an HTML to PDF converter for PHP
CVE-2026-56722 MEDIUM 5.3 UPGRADE Dompdf is an HTML to PDF converter for PHP
CVE-2026-59941 HIGH 7.5 UPGRADE Dompdf is an HTML to PDF converter for PHP
CVE-2026-59942 HIGH 7.5 UPGRADE Dompdf is an HTML to PDF converter for PHP

References

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