CVE-2026-72783

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 (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.

Affected Software

VendorProductVersion RangeStatus
craftcmscms5.0.0-RC1 < 5.10.6affected
craftcmscms5.10.6unaffected
craftcmscms4.0.0-RC1 < 4.18.2affected
craftcmscms4.18.2unaffected

Weaknesses

  • CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

References