Medium severity · published Jun 21, 2026
CVE-2026-56394
Craft CMS - Authenticated Path Traversal in assets/icon Extension Parameter
6.5
CVSS
0.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 42% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CM
cms · craftcms
4.0.0-RC1 before 4.17.7; 5.0.0-RC1 before 5.9.13 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-56394
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-56394
github.com
https://github.com/craftcms/cms/commit/30f5f1a8d6edf0f3a00be72c42c78d9dc7d72d5c
github.com
https://github.com/craftcms/cms/security/advisories/GHSA-c43v-4cr8-6mvp
www.vulncheck.com
https://www.vulncheck.com/advisories/craft-cms-authenticated-path-traversal-in-assets-icon-extension-parameter
More from cms
10.0
CVE-2025-32432
Craft CMS Allows Remote Code Execution
9.8
CVE-2024-56145
RCE when PHP `register_argc_argv` config setting is enabled in craftcms/cms
8.1
CVE-2025-23209
Potential RCE with a compromised security key in craft/cms
9.8
CVE-2026-112776
Craft CMS 5.0.0 before 5.11.0 GraphQL Site-Scope Bypass via Mutations
9.8
CVE-2026-84795
Craft CMS before 5.10.11 Authentication Bypass via Admin Flag Inheritance