Auth bypass in Craftcms Cms
CVE-2026-33158
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, 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. This issue has been patched in versions 4.17.8 and 5.9.14.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (34.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 34th percentile — 34.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.001
Affected products
- Craftcms Cms — versions >= 4.0.0-RC1, < 4.17.8, >= 5.0.0-RC1, < 5.9.14
- Craftcms Craft Cms — versions 4.0.0, 5.0.0
Weakness classification (CWE)
References
- github.com/craftcms/cms/security/advisories/GHSA-3pvf-vxrv-hh9c (Vendor Advisory)
- github.com/craftcms/cms/commit/7290d91639e5e3a4f7e221dfbef95c9b77331860 (Patch)
- github.com/craftcms/cms/releases/tag/4.17.8 (Release Notes)
- github.com/craftcms/cms/releases/tag/5.9.14 (Release Notes)
Frequently asked questions
- What is CVE-2026-33158?
- CVE-2026-33158 is a medium-severity vulnerability in Craftcms Cms, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2026-03-24.
- How severe is CVE-2026-33158?
- Medium severity. CVSS v3 base score is 6.5 out of 10.