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TI-2026-40895 Aliases CVE-2026-56722GHSA-cx96-42px-69fm

Dompdf: Local file read due to improper file path validation in SVG images encoded as data-URI

Priority HIGH 67CWE-20Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
Information disclosure
Confidentiality · integrity · availability
Low · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-22 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00448 39th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed dompdf (dompdf): 3.1.6dompdf/dompdf (Packagist): 3.1.6

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
dompdfdompdfbefore 3.1.63.1.6Patch availableCNA
—dompdf/dompdf (Packagist)before 3.1.63.1.6Patch availableGHSA-cx96-42px-69fm
  • dompdf Vendordompdf Affected before 3.1.6 Fixed in 3.1.6 Patch available CNA
  • dompdf/dompdf (Packagist) Vendor— Affected before 3.1.6 Fixed in 3.1.6 Patch available GHSA-cx96-42px-69fm

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:dompdf_project:dompdf:*:*:*:*:*:*:*:*before 3.1.6VulnerableDompdf Project
  • cpe:2.3:a:dompdf_project:dompdf:*:*:*:*:*:*:*:* Versions before 3.1.6 Vulnerable ·Dompdf Project

Remediation

  • Fix · CNA dompdf (dompdf) Fixed in 3.1.6
  • Fix · GHSA-cx96-42px-69fm dompdf/dompdf (Packagist) Fixed in 3.1.6 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-56722
  2. 2026-10-03 Alias added: GHSA-cx96-42px-69fm

References

Exploit 1

Patch 2

Other 2

  • TI-2023-10313 URI validation failure on SVG parsing. Bypass of CVE-2023-23924 CVSS 3.1CRITICAL 10.0
  • TI-2023-09722 URI validation failure on SVG parsing in Dompdf CVSS 3.1CRITICAL 10.0
  • TI-2021-02812 Improper Restriction of XML External Entity Reference in dompdf/dompdf CVSS 3.1CRITICAL 9.8
  • TI-2021-02769 PHAR Deserialization in dompdf/dompdf CVSS 3.1CRITICAL 9.8
  • TI-2024-16571 php-svg-lib lacks path validation on font through SVG inline styles CVSS 3.1CRITICAL 9.8
  • TI-2023-27479 php-svg-lib possible DoS caused by infinite recursion when parsing SVG document CVSS 3.1HIGH 7.5
See all 16 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences