# CVE-2026-109162: TYPO3 CMS FileUpload/ImageUpload storage bypass

Source: https://junglewise.ai/threats/cve-2026-109162-forms-using-fileupload-or-imageupload-elements-with-a-custom  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-13. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-109162 · Severity: info · Published 2026-10-13

TYPO3 is a web content management system used to build and manage websites. When form elements like file or image uploads are configured with a custom restricted storage location, the files may be incorrectly saved to a default public folder instead. This exposes uploaded files that should remain private to potential unauthorized access.

Vendors: [Typo3](https://junglewise.ai/threats/vendors/typo3).

## Quick answers

**Is CVE-2026-109162 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-109162 being exploited in the wild.

**How severe is CVE-2026-109162?** Informational severity, published 13 October 2026.

**Which products and versions are affected?** Typo3 CMS 14.0.0 through 14.3.8.

**Is there a fix for CVE-2026-109162?** Yes: fixed in 14.4.0 or later; also available in backported fixes for earlier versions on 14.3 branch. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-109162 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-109162?** Check whether you run Typo3 CMS 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.

## How to fix

- Fixed in 14.4.0 or later; also available in backported fixes for earlier versions on 14.3 branch

## Technical details

Forms using FileUpload or ImageUpload elements with saveToFileMount configured to a custom destination failed to respect that configuration due to folder resolution occurring before element properties were applied, causing files to default to the public 1:/user_upload/ folder. An attacker could upload files expecting them to be stored in a restricted storage and have them end up in public storage served without access control. The issue affects form-initiated uploads only; forms using the default saveToFileMount value are not affected.

## Affected products

- TYPO3 CMS 14.0.0 through 14.3.8

## Timeline

- 2026-10-13: disclosed

## References

- [https://packagist.org/](https://packagist.org/)
- [https://github.com/TYPO3/typo3/commit/cc3e8e28b0e830aaf6ad857272f3f2dc3c4ede12](https://github.com/TYPO3/typo3/commit/cc3e8e28b0e830aaf6ad857272f3f2dc3c4ede12)