CVE-2026-56394

Medium

Description

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 traversal sequences that resolve to existing SVG files, allowing local file read access.

SeverityMedium

CVSS6.5

Exploit probability—

ProductCraftcms/cms

PublishedJun 21, 2026

First seenJun 21, 2026

Weakness typeCWE-22Path traversal

How to fix

Update

craftcms/cms4.17.7, 5.9.13 or later

Patches

github.com/craftcms/cms/commit/30f5f1a8d6edf0f3a00be72c42c78d9dc7d72d5c

Vendor advisories

github.com/craftcms/cms/security/advisories/GHSA-c43v-4cr8-6mvp

Affected products

Product	Affected versions	Fixed in
craftcms/cmsPackagist	4.0.0-RC1 ≤ v < 4.17.7, 5.0.0-RC1 ≤ v < 5.9.13	4.17.7, 5.9.13

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