smarty-php Smarty up to 4.5.6/5.8.1 Directory Validation Security::_checkDir path traversal

Summaryinfo

A vulnerability has been found in smarty-php Smarty up to 4.5.6/5.8.1 and classified as problematic. The affected element is the function Security::_checkDir of the component Directory Validation. This manipulation causes path traversal. The identification of this vulnerability is CVE-2026-62992. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability classified as problematic was found in smarty-php Smarty up to 4.5.6/5.8.1. Affected by this vulnerability is the function Security::_checkDir of the component Directory Validation. The manipulation with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality. The summary by CVE is:

Smarty is a template engine for PHP, facilitating the separation of presentation (HTML/CSS) from application logic. Prior to 5.8.2 (and 4.5.7 on the 4.x line), Security::_checkDir() does not fully resolve symbolic links before validating that a requested path lies within a configured secure directory. An attacker able to place or reference a symlink within a directory Smarty treats as trusted (e.g., a template or config directory) could use it to point outside the intended secure directory, bypassing the containment check and reading arbitrary files accessible to the PHP process. This issue is fixed in versions 5.8.2 and 4.5.7.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-62992 since 07/15/2026. The exploitation appears to be easy. The attack can be launched remotely. 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 4.5.7 or 5.8.2 eliminates this vulnerability.

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Productinfo

Type

• Customer Relationship Management System

Vendor

• smarty-php

Name

• Smarty

Version

• 4.5.0
• 4.5.1
• 4.5.2
• 4.5.3
• 4.5.4
• 4.5.5
• 4.5.6
• 5.8.0
• 5.8.1

License

• commercial

Website

• Product: https://github.com/smarty-php/smarty/

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