# CVE-2026-54414: error311 FileRise path traversal in shared-folder upload

Source: https://junglewise.ai/threats/cve-2026-54414-error311-filerise-path-traversal-in-shared-folder-upload  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-19. Updated: 2026-06-21  
License: CC BY 4.0 with a link back

CVE-2026-54414 · Severity: critical · CVSS 9.8 · Published 2026-06-19

FileRise, a self-hosted file management and storage platform, is vulnerable to a security flaw that allows unauthorized users to overwrite critical system files. By using a specially crafted file upload request, an attacker can bypass security checks to overwrite the administrator account database. This can lead to a complete takeover of the system and, in some cases, allow the attacker to execute malicious code on the server.

Technologies: [Error311 FileRise](https://junglewise.ai/threats/technologies/filerise). Vendors: [Error311](https://junglewise.ai/threats/vendors/error311).

## Quick answers

**Is CVE-2026-54414 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-54414 being exploited in the wild.

**How severe is CVE-2026-54414?** Critical severity, with a CVSS score of 9.8, published 19 June 2026.

**Which products and versions are affected?** Error311 FileRise before 3.16.0.

**Is there a fix for CVE-2026-54414?** A patch was published on 2026-06-17: Version 3.16.0 released Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-54414 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-54414?** Check whether you run Error311 FileRise at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A path traversal vulnerability exists in the `/api/folder/uploadToSharedFolder.php` endpoint of FileRise. The `FolderController` validates filenames using `basename()` and a regex that fails to account for URL-encoded characters (e.g., `%2f`). When `UploadModel::handleUpload` subsequently calls `urldecode()`, path separators are re-introduced (e.g., `..%2f` becomes `../`), allowing files to be written outside the intended directory. Because `UploadNamePolicy::isAllowedForWrite()` only checks the final component of the path, the traversal sequence bypasses extension policies. An attacker with a valid shared-folder token can overwrite `users/users.txt` to create an admin account, leading to full application compromise and potential RCE. This is fixed in version 3.16.0 by decoding filenames before validation.

## Affected products

- error311 FileRise before 3.16.0

## Timeline

- 2026-06-17: patched: Version 3.16.0 released
- 2026-06-19: disclosed: CVE-2026-54414 published

## References

- [https://github.com/error311/FileRise](https://github.com/error311/FileRise)
- [https://github.com/error311/FileRise/blob/v3.15.0/src/FileRise/Domain/UploadModel.php](https://github.com/error311/FileRise/blob/v3.15.0/src/FileRise/Domain/UploadModel.php)
- [https://github.com/error311/FileRise/releases/tag/v3.16.0](https://github.com/error311/FileRise/releases/tag/v3.16.0)

## Related threats

- [FileRise authentication bypass via proxy header spoofing](https://junglewise.ai/threats/cve-2026-57489-filerise-is-a-self-hosted-web-based-file-manager-with-multi-file)
- [FileRise path traversal in archive extraction via symlink](https://junglewise.ai/threats/cve-2026-104109-filerise-is-a-self-hosted-web-based-file-manager-with-multi-file)
- [FileRise TOTP bypass via session reset](https://junglewise.ai/threats/cve-2026-103977-filerise-is-a-self-hosted-web-based-file-manager-with-multi-file)
- [FileRise missing CSRF enforcement for file creation](https://junglewise.ai/threats/cve-2026-54459-filerise-is-a-self-hosted-web-based-file-manager-with-multi-file)
- [error311 FileRise TOTP bypass in totp_setup.php](https://junglewise.ai/threats/cve-2026-44460-error311-filerise-totp-bypass-in-totp-setup-php)