What is CVE-2026-56385?

CVE-2026-56385 is a medium-severity vulnerability in Craftcms Cms, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 4.3/10. Published 2026-06-21.

How severe is CVE-2026-56385?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Auth bypass in Craftcms Cms

CVE-2026-56385

Craft CMS versions >= 5.0.0-RC1, <= 5.9.13 and >= 4.0.0-RC1, <= 4.17.7 contain an authorization bypass in the assets/preview-file endpoint. The action does not enforce per-asset view authorization before returning preview content, allowing…

Vulnerability class: IDOR (Insecure Direct Object Reference)

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

Affected products

Craftcms Cms — versions 5.0.0-RC1, 5.9.14, 4.0.0-RC1

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (patch)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-56385?: CVE-2026-56385 is a medium-severity vulnerability in Craftcms Cms, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 4.3/10. Published 2026-06-21.
How severe is CVE-2026-56385?: Medium severity. CVSS v3 base score is 4.3 out of 10.