CVE-2026-33158
EPSS 0.02%Craft CMS: Low-privilege users could read private asset contents when editing an asset (IDOR)
Description
### Summary A low-privileged authenticated user can read private asset content by calling `assets/edit-image` with an arbitrary `assetId` that they are not authorized to view. The endpoint returns image bytes (or a preview redirect) without enforcing a per-asset view authorization check, leading to potential unauthorized disclosure of private files. ### Details Root cause: - A user-controlled object reference (`assetId`) is used to load and return sensitive content. - The action does not verify whether the current user is authorized to view that asset. - This creates an authenticated IDOR / authorization bypass. ### Impact - Craft installations where private/non-public assets exist and low-privileged users can authenticate. ## Resources https://github.com/craftcms/cms/commit/7290d91639e
Affected packages (1)
- Packagist/craftcms/cms>= 4.0.0-RC1, < 4.17.8
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U |
References (6)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2026-33158
- PATCHhttps://github.com/craftcms/cms
- WEBhttps://github.com/craftcms/cms/commit/7290d91639e5e3a4f7e221dfbef95c9b77331860
- WEBhttps://github.com/craftcms/cms/releases/tag/4.17.8
- WEBhttps://github.com/craftcms/cms/releases/tag/5.9.14
- WEBhttps://github.com/craftcms/cms/security/advisories/GHSA-3pvf-vxrv-hh9c