What is CVE-2026-56394?

CVE-2026-56394 is a medium-severity vulnerability in Craftcms Cms, classified under Path Traversal. CVSS score: 6.5/10. Published 2026-06-21.

How severe is CVE-2026-56394?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Path Traversal in Craftcms Cms

CVE-2026-56394

Craft CMS from 4.0.0-RC1 contains an authenticated path traversal vulnerability in the assets/icon endpoint where the extension parameter is not validated before file existence checks. Attackers can bypass extension validation by passing t…

Vulnerability class: Path Traversal (Directory Traversal)

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.

Affected products

Craftcms Cms — versions 4.0.0-RC1, 4.17.7, 5.0.0-RC1

Weakness classification (CWE)

CWE-22 — Path Traversal

References

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

Frequently asked questions

What is CVE-2026-56394?: CVE-2026-56394 is a medium-severity vulnerability in Craftcms Cms, classified under Path Traversal. CVSS score: 6.5/10. Published 2026-06-21.
How severe is CVE-2026-56394?: Medium severity. CVSS v3 base score is 6.5 out of 10.