CVE-2026-56722Public exploitNetwork attack vectorHinoki check available

Arbitrary image-file read via data-URI SVG bypass

Published Jul 28, 2026 · Updated Jul 28, 2026

Path traversal in dompdf before 3.1.6 allows remote attackers to read arbitrary image files via crafted HTML containing a data-URI SVG. The renderer validates the SVG once, then enables external references in php-svg-lib, whose image handler passes the nested path to file_get_contents without chroot or protocol validation. The default configuration is exposed only where attacker-controlled HTML reaches dompdf, and disclosure is limited to files that the image pipeline can decode and embed.

CVSS severity6.3
Medium
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Path traversal in dompdf before 3.1.6 allows remote attackers to read arbitrary image files via crafted HTML containing a data-URI SVG. The renderer validates the SVG once, then enables external references in php-svg-lib, whose image handler passes the nested path to file_get_contents without chroot or protocol validation. The default configuration is exposed only where attacker-controlled HTML reaches dompdf, and disclosure is limited to files that the image pipeline can decode and embed.

The record

CVE
CVE-2026-56722
Published
Jul 28, 2026
Updated
Jul 28, 2026
Vendor
dompdf
Product
dompdf
Classifications
CWE-20, CWE-22, T1005
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 3.1.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

dompdf · dompdfversion=< 3.1.6

Published CVSS scores

6.3GitHubCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
5.3NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-20Improper Input Validation
CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1005Data from Local System

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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