CVE-2026-55554

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.

CVSS

No CVSS.

References

Link	Resource
https://github.com/dompdf/dompdf/releases/tag/v3.1.6
https://github.com/dompdf/dompdf/security/advisories/GHSA-wvh6-f5jh-8gw4
https://github.com/dompdf/dompdf/security/advisories/GHSA-wvh6-f5jh-8gw4

Configurations

No configuration.

History

29 Jul 2026, 16:17

Type	Values Removed	Values Added
References	~~() https://github.com/dompdf/dompdf/security/advisories/GHSA-wvh6-f5jh-8gw4 -~~	() https://github.com/dompdf/dompdf/security/advisories/GHSA-wvh6-f5jh-8gw4 -

28 Jul 2026, 20:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-07-28 20:17

Updated : 2026-07-30 16:33

NVD link : CVE-2026-55554

Mitre link : CVE-2026-55554

CVE.ORG link : CVE-2026-55554

JSON object : View

Products Affected

No product.

CWE

CWE-20

Improper Input Validation

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