CVE-2026-72783
MediumCVSS 6.2Exploitation Probability (EPSS)
Low risk5th percentile - higher than 5% of all known CVEs
Summary
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 validation assumptions and potentially resolve to files outside the intended volume directory. The vendor notes the issue is not directly exploitable and no exploitable scenario has been discovered; the fix is recommended for hardening.
Risk Assessment
The risk is low, but if exploited, an attacker could access files outside the volume directory, potentially exposing sensitive data. Applying the fix is recommended as a hardening measure.
Recommendation
Update Craft CMS to version 5.10.6 or 4.18.2 (or later) to eliminate the weakness and harden the system.
Original NVD description (English source)
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 validation assumptions (a desanitization-style issue) and potentially resolve to files outside the intended volume directory. The vendor notes the issue is not directly exploitable and no exploitable scenario has been discovered; the fix is recommended for hardening.