What’s Vulnerable › Vulnerabilities

CVE-2026-72783: Craft CMS 5.0.0-RC1 before 5.10.6 Path Traversal via ensurePathIsContained

• Severity: medium (CVSS 6.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-11 · updated 2026-10-24
• Weakness: CWE-22

Description

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 products

• craftcms cms: from 5.0.0-RC1 before 5.10.6; from 4.0.0-RC1 before 4.18.2 — fixed in 4.18.2, 5.10.6

How to fix

Upgrade to a fixed version: craftcms cms 4.18.2, 5.10.6. Check the vendor advisory for mitigations.

References

• https://github.com/craftcms/cms/security/advisories/GHSA-7hxc-f267-h5q7
• https://www.vulncheck.com/advisories/craft-cms-rc1-before-path-traversal-via-ensurepathiscontained

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