code16 sharp up to 9.19.x Management Frame src/Utils/FileUtil.php explodeExtension path traversal

Summaryinfo

A vulnerability, which was classified as critical, was found in code16 sharp up to 9.19.x. Impacted is the function FileUtil::explodeExtension of the file src/Utils/FileUtil.php of the component Management Frame Handler. The manipulation results in path traversal. This vulnerability is cataloged as CVE-2026-33686. The attack may be launched remotely. There is no exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in code16 sharp up to 9.19.x. Affected is the function FileUtil::explodeExtension of the file src/Utils/FileUtil.php of the component Management Frame Handler. The manipulation with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Sharp is a content management framework built for Laravel as a package. Versions prior to 9.20.0 have a path traversal vulnerability in the FileUtil class. The application fails to sanitize file extensions properly, allowing path separators to be passed into the storage layer. In `src/Utils/FileUtil.php`, the `FileUtil::explodeExtension()` function extracts a file's extension by splitting the filename at the last dot. This issue has been patched in version 9.20.0 by properly sanitizing the extension using `pathinfo(PATHINFO_EXTENSION)` instead of `strrpos()`, alongside applying strict regex replacements to both the base name and the extension.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-33686 since 03/23/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1006 by the MITRE ATT&CK project.

By approaching the search of inurl:src/Utils/FileUtil.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 9.20.0 eliminates this vulnerability.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• code16

Name

• sharp

Version

• 9.0
• 9.1
• 9.2
• 9.3
• 9.4
• 9.5
• 9.6
• 9.7
• 9.8
• 9.9
• 9.10
• 9.11
• 9.12
• 9.13
• 9.14
• 9.15
• 9.16
• 9.17
• 9.18
• 9.19

Website

• Product: https://github.com/code16/sharp/

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