What’s Vulnerable › Vulnerabilities

CVE-2026-56394: Craft CMS - Authenticated Path Traversal in assets/icon Extension Parameter

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-21 · updated 2026-10-25
• Weakness: CWE-22

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.

Affected products

• craftcms cms: from 4.0.0-RC1 before 4.17.7; from 5.0.0-RC1 before 5.9.13 — fixed in 4.17.7, 5.9.13

How to fix

Upgrade to a fixed version: craftcms cms 4.17.7, 5.9.13. Check the vendor advisory for mitigations.

References

• https://github.com/craftcms/cms/commit/30f5f1a8d6edf0f3a00be72c42c78d9dc7d72d5c
• https://github.com/craftcms/cms/security/advisories/GHSA-c43v-4cr8-6mvp
• https://www.vulncheck.com/advisories/craft-cms-authenticated-path-traversal-in-assets-icon-extension-parameter

Get alerted when CVE-2026-56394 or the next vulnerability affects your stack