CVE-2026-33071 FileRise: WebDAV upload path bypasses filename validation enforced by regular uploads

Medium 4.3 Published 20 Mar 2026 Updated 20 Mar 2026

Attackers can upload executable files via WebDAV to achieve remote code execution in FileRise deployments lacking specific Apache protections.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-33071?

CVE-2026-33071 is a medium-severity vulnerability in error311 FileRise, published on 20 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

FileRise is a self-hosted web file manager / WebDAV server. In versions prior to 3.8.0, the WebDAV upload endpoint accepts any file extension including .phtml, .php5, .htaccess, and other server-side executable types, bypassing the filename validation enforced by the regular upload path. In non-default deployments lacking Apache's LocationMatch protection, this leads to remote code execution. When files are uploaded via WebDAV, the createFile() method in FileRiseDirectory.php and the put() method in FileRiseFile.php accept the filename directly from the WebDAV client without any validation. In contrast, the regular upload endpoint in UploadModel::upload() validates filenames against REGEX_FILE_NAME. This issue is fixed in version 3.8.0.

Weakness: CWE-552, CWE-434

Which versions are affected by CVE-2026-33071?

It affects 1 product.

Products include Filerise Filerise.

How do I fix CVE-2026-33071?

No fix has been published for CVE-2026-33071 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-33071 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-33071 exists.

Sources

Also known as GHSA-46gv-gf5f-wvr2.