CVE-2026-72783 Craft CMS 5.0.0-RC1 before 5.10.6 Path Traversal via ensurePathIsContained
Craft CMS contains a theoretical path traversal flaw in file system validation that could allow reading files outside intended directories, though no direct exploitation is known.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-72783?
CVE-2026-72783 is a medium-severity path traversal vulnerability in craftcms cms, published on 11 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-22
Which versions are affected by CVE-2026-72783?
4 open source packages ship an affected version, including craftcms/cms.
| Package | Affected | Fixed in |
|---|---|---|
craftcms/cms Packagist | From 4.0.0-RC1 | 4.18.2 |
craftcms/cms Packagist | From 4.0.0-RC1 | 4.18.2 |
craftcms/cms Packagist | From 5.0.0-RC1 | 5.10.6 |
craftcms/cms Packagist | From 5.0.0-RC1 | 5.10.6 |
How do I fix CVE-2026-72783?
Upgrade craftcms/cms to a fixed version for your release line: 4.18.2 or 5.10.6.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-72783 being exploited?
There is no known exploitation of CVE-2026-72783 in the wild and no public exploit code.
Sources
Also known as GHSA-7hxc-f267-h5q7.