CVE-2026-33160 Craft CMS: Anonymous "generate transform" calls for assets can expose private assets via transform URL
Unauthenticated attackers can access private asset images by exploiting missing authorization checks in the asset transform generation endpoint.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-33160?
CVE-2026-33160 is a low-severity missing authorization vulnerability in Craftcms Craft Cms, published on 24 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Craft CMS is a content management system (CMS). From version 4.0.0-RC1 to before version 4.17.8 and from version 5.0.0-RC1 to before version 5.9.14, an unauthenticated user can call assets/generate-transform with a private assetId, receive a valid transform URL, and fetch transformed image bytes. The endpoint is anonymous and does not enforce per-asset authorization before returning the transform URL. This issue has been patched in versions 4.17.8 and 5.9.14.
Which versions are affected by CVE-2026-33160?
4 open source packages ship an affected version, including craftcms/cms. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
craftcms/cms Packagist | From 4.0.0-RC1 | 4.17.8 |
craftcms/cms Packagist | From 4.0.0-RC1 | 4.17.8 |
craftcms/cms Packagist | From 5.0.0-RC1 | 5.9.14 |
craftcms/cms Packagist | From 5.0.0-RC1 | 5.9.14 |
Products include Craftcms Craft Cms.
How do I fix CVE-2026-33160?
Upgrade craftcms/cms to a fixed version for your release line: 4.17.8 or 5.9.14.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-33160 being exploited?
There is no known exploitation of CVE-2026-33160 in the wild and no public exploit code.
Other vulnerabilities in Craftcms Craft Cms
Sources
Also known as GHSA-5pgf-h923-m958.