Description
Sharp is a content management framework built for Laravel as a package. Versions prior to 9.20.0 contain a vulnerability in the file upload endpoint that allows authenticated users to bypass all file type restrictions. The upload endpoint within the `ApiFormUploadController` accepts a client-controlled `validation_rule` parameter. This parameter is directly passed into the Laravel validator without sufficient server-side enforcement. By intercepting the request and sending `validation_rule[]=file`, an attacker can completely bypass all MIME type and file extension restrictions. This issue has been addressed in version 9.20.0 by removing the client-controlled validation rules and strictly defining upload rules server-side. As a workaround, ensure that the storage disk used for Sharp uploads is strictly private. Under default configurations, an attacker cannot directly execute uploaded PHP files unless a public disk configuration is explicitly used.
INFO
Published Date :
2026-03-26T21:47:55.573Z
Last Modified :
2026-03-27T20:28:53.385Z
Source :
GitHub_M
AFFECTED PRODUCTS
The following products are affected by CVE-2026-33687 vulnerability.
| Vendors | Products |
|---|---|
| Code16 |
|
REFERENCES
Here, you will find a curated list of external links that provide in-depth information to CVE-2026-33687.
