What’s Vulnerable › Vulnerabilities

CVE-2026-33160: Craft CMS: Anonymous "generate transform" calls for assets can expose private assets via transform URL

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-03-24 · updated 2026-06-17
• Weakness: CWE-639

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.

Affected products

• craftcms cms: from 4.0.0 (excl.) before 4.17.8; from 5.0.0 (excl.) before 5.9.14; 4.0.0, 4.0.0-rc1, 4.0.0-rc2, 4.0.0-rc3, 5.0.0, 5.0.0-rc1 — fixed in 4.17.8, 5.9.14

How to fix

Upgrade to a fixed version: craftcms cms 4.17.8, 5.9.14. Check the vendor advisory for mitigations.

References

• https://github.com/craftcms/cms/commit/7290d91639e
• https://github.com/craftcms/cms/releases/tag/4.17.8
• https://github.com/craftcms/cms/releases/tag/5.9.14
• https://github.com/craftcms/cms/security/advisories/GHSA-5pgf-h923-m958

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