craftcms Craft CMS up to 5.10.5/4.18.1 Twig create path traversal

Summaryinfo

A vulnerability was found in craftcms Craft CMS up to 5.10.5/4.18.1. It has been classified as problematic. This vulnerability affects the function create of the component Twig. The manipulation leads to path traversal. This vulnerability is uniquely identified as CVE-2026-72779. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in craftcms Craft CMS up to 5.10.5/4.18.1. This issue affects the function create of the component Twig. 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 5.0.0-RC1 before 5.10.6 and 4.0.0-RC1 before 4.18.2 contain an arbitrary file read vulnerability. The create() Twig function restricts class instantiation using a 5-entry blocklist that does not include SplFileObject, allowing an authenticated administrator (with allowAdminChanges=true) to configure a malicious entry type title or URI format that instantiates SplFileObject in a non-sandboxed template context. When a user subsequently creates an entry in the affected section, arbitrary files on the server (such as .env containing the security key and database credentials) are read and rendered as entry titles.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-72779 since 08/10/2026. The exploitation is known to be easy. The attack may be initiated remotely. Additional levels of successful authentication are required for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

Upgrading to version 5.10.6 or 4.18.2 eliminates this vulnerability.

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Productinfo

Type

• Content Management System

Vendor

• craftcms

Name

• Craft CMS

Version

• 4.18.0
• 4.18.1
• 5.10.0
• 5.10.1
• 5.10.2
• 5.10.3
• 5.10.4
• 5.10.5

License

• free

CPE 2.3info

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CPE 2.2info

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Entryinfo

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