AIKIDO-2026-726718
craftcms/cms is vulnerable to Path Traversal
20
Low Risk
This Affects:
craftcms/cmsTL;DR
The path-containment check in Craft CMS's local file system validates a path before normalizing it and prepending the volume prefix. Because normalization happens after validation, the assumptions made during validation can be invalidated when resolving asset file streams, creating a theoretical path-traversal condition. No exploitable scenario was demonstrated, but the ordering of validation and normalization is unsafe. The fix reorders the steps so the final resolved path is checked for containment.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range.
Background info
craftcms/cms is vulnerable to Path Traversal in versions 4.0.0 - 4.18.1 and 5.0.0 - 5.10.5.
How to fix this
Upgrade the craftcms/cms library to the patch version.
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SOC 2Compliant
ISO 27001Compliant