# Umbraco.Forms CDN may cache sensitive form uploads when processed by ImageSharp

Source: https://junglewise.ai/threats/umbraco-forms-cdn-may-cache-sensitive-form-uploads-when-processed-by-8be15443  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-01-22  
License: CC BY 4.0 with a link back

Severity: low · CVSS 3.1 · Published 2026-01-22

Umbraco.Forms CDN may cache sensitive form uploads when processed by ImageSharp

Technologies: [Umbraco.Forms (NuGet)](https://junglewise.ai/threats/technologies/umbraco-forms). Vendors: [NuGet](https://junglewise.ai/threats/vendors/nuget).

## Quick answers

**Is This vulnerability exploited in the wild?** No. Junglewise Threat Intelligence has no report of This vulnerability being exploited in the wild.

**How severe is This vulnerability?** Low severity, with a CVSS score of 3.1, published 22 January 2026.

**Which products and versions are affected?** Umbraco.Forms (NuGet) ECOSYSTEM:introduced=0,fixed=13.9.0.

**Is there a fix for This vulnerability?** Yes. Umbraco.Forms (NuGet): upgrade to 13.9.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected?** Check whether you run Umbraco.Forms (NuGet) 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

- Umbraco.Forms (NuGet): upgrade to 13.9.0 or later

  ```sh
  dotnet add package Umbraco.Forms --version 13.9.0
  ```


## Affected products

- Umbraco.Forms (NuGet) ECOSYSTEM:introduced=0,fixed=13.9.0

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