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CVE-2026-55554

LOW
2.3
CVSS 4.0
Description
Dompdf is an HTML to PDF converter for PHP. In versions 3.15 and prior, the validateLocalUri() method enforces chroot boundaries with a strpos() prefix check after normalizing paths with  realpath() . Because normalization strips the trailing directory separator from  $chrootPath , the check only verifies that  $chrootPath  is a string prefix of $realfile, so a chroot of  /var/www  also matches sibling directories like /var/www2 , /var/www-admin, or /var/www_backup. An attacker who controls part of the rendered HTML could exploit this to escape the chroot and read sensitive files outside the allowed directory. This issue has been fixed in version 3.16.

Metadata

CVE ID
CVE-2026-55554
State
PUBLISHED
Assigner
GitHub_M
Reserved
2026-06-16 23:11 UTC
Published
2026-07-28 19:28 UTC
Last updated
2026-07-28 19:28 UTC
Primary CWE
CWE-20
CWE-20: Improper Input Validation
Vendor / Product
dompdf / dompdf
Sources
cve.org  ·  NVD

Severity & Metrics

2.3 LOW CVSS 4.0
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Affected products (1)
VendorProductPlatformVersions
dompdf dompdf — < 3.1.6
Weakness (CWE)
CWESourceDescription
CWE-20 cna CWE-20: Improper Input Validation
CVSS scores (1)
ScoreSeverityVersionSourceVector
2.3 LOW 4.0 cna CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
References (2)
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