CVE-2026-55554

CVE-2026-55554 · Dompdf: Chroot Validation Bypass

Cette page présente des faits issus de sources publiques. Consultez l’avis original avant toute mise à jour.

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 2.3 · Faible · EPSS 0,5% · Correctif disponible

Publication

2026-07-28T19:28:43.838Z

Mise à jour

2026-07-29T15:24:54.517Z

Pile logicielle: system · php

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