Craft CMS up to 4.17.6/5.9.12 SVG File path traversal

Summaryinfo

A vulnerability identified as critical has been detected in Craft CMS up to 4.17.6/5.9.12. Affected by this vulnerability is an unknown functionality of the component SVG File Handler. The manipulation leads to path traversal. This vulnerability is uniquely identified as CVE-2026-56394. The attack is possible to be carried out remotely. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Craft CMS up to 4.17.6/5.9.12. This issue affects some unknown functionality of the component SVG File Handler. The manipulation with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-22. The product 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 product 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. Impacted is confidentiality. The summary by CVE is:

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.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-56394 since 06/21/2026. The exploitation is known to be easy. The attack may be initiated remotely. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

Upgrading to version 4.17.7 or 5.9.13 eliminates this vulnerability. Applying the patch 30f5f1a8d6edf0f3a00be72c42c78d9dc7d72d5c is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-38160). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Content Management System

Vendor

• Craft

Name

• CMS

Version

• 4.17.0
• 4.17.1
• 4.17.2
• 4.17.3
• 4.17.4
• 4.17.5
• 4.17.6
• 5.9.0
• 5.9.1
• 5.9.2
• 5.9.3
• 5.9.4
• 5.9.5
• 5.9.6
• 5.9.7
• 5.9.8
• 5.9.9
• 5.9.10
• 5.9.11
• 5.9.12

License

• free

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CPE 2.2info

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Be aware that VulDB is the high quality source for vulnerability data.

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