CVE-2026-44012 Craft CMS: Missing Volume Permission Check in AssetsController::actionShowInFolder Allows Information Disclosure
Authenticated users can bypass volume permissions to enumerate asset filenames and folder structures in Craft CMS.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-44012?
CVE-2026-44012 is a high-severity missing authorization vulnerability in craftcms cms, published on 12 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Craft CMS is a content management system (CMS). From 5.0.0-RC1 to before 5.9.18, AssetsController::actionShowInFolder() fetches an asset by ID and returns its filename and complete folder hierarchy (including volume handle, volume UID, folder names, folder UIDs, and folder URI paths) without checking whether the requesting user has viewAssets or viewPeerAssets permission on the asset’s volume. Any authenticated CP user — even one with zero volume permissions — can enumerate asset filenames and the full folder structure of any volume by supplying arbitrary asset IDs. This vulnerability is fixed in 5.9.18.
Weakness: CWE-862
Which versions are affected by CVE-2026-44012?
2 open source packages ship an affected version, including craftcms/cms.
| Package | Affected | Fixed in |
|---|---|---|
craftcms/cms Packagist | From 5.0.0-RC1 | 5.9.18 |
craftcms/cms Packagist | From 5.0.0-RC1 | 5.9.18 |
How do I fix CVE-2026-44012?
Upgrade craftcms/cms to 5.9.18 or later.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-44012 being exploited?
There is no known exploitation of CVE-2026-44012 in the wild and no public exploit code.
Sources
Also known as GHSA-33m5-hqp9-97pw.