Flysystem normalizePath() Path Traversal

The vulnerability of the normalizePath function in the src/WhitespacePathNormalizer.php file of the Flysystem library is related to the failure to take measures to eliminate special elements. Exploiting this vulnerability could allow a remote attacker to compromise the integrity of the protected...

CVE-2026-102601

Flysystem is an open source file storage library for PHP. Prior to 3.35.3, the default WhitespacePathNormalizer in src/WhitespacePathNormalizer.php used by Filesystem across adapters calls pregmatch with the u modifier and treats both false and 0 as falsy. A path containing malformed UTF-8 causes...