Craft CMS 4.0.0RC1 Path Traversal Local File Read via assets/icon
CVE-2026-56394 Published on June 21, 2026
Craft CMS - Authenticated Path Traversal in assets/icon Extension Parameter
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.
Vulnerability Analysis
CVE-2026-56394 is exploitable with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality, with no impact on integrity and availability.
Weakness Type
What is a Directory traversal Vulnerability?
The software uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the software does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.
CVE-2026-56394 has been classified to as a Directory traversal vulnerability or weakness.
Products Associated with CVE-2026-56394
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Affected Versions
craftcms cms:- Version 4.0.0-RC1 and below 4.17.7 is affected.
- Version 4.17.7 is unaffected.
- Version 5.0.0-RC1 and below 5.9.13 is affected.
- Version 5.9.13 is unaffected.