CVE-2026-72783: Improper Limitation of a Pathname to a Restricted Directory

Craft CMS versions = 5.0.0-RC1 before 5.10.6 and = 4.0.0-RC1 before 4.18.2 contain a theoretical path traversal weakness in the ensurePathIsContained function of the Local file system class. The order of operations validates the path before normalization, so normalization could invalidate prior...