# CVE-2026-116675: TinyMCE media plugin stored cross-site scripting

Source: https://junglewise.ai/threats/cve-2026-116675-tinymce-is-an-open-source-rich-text-editor-from-7-9-3-until-7-9  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-27. Updated: 2026-10-27  
License: CC BY 4.0 with a link back

CVE-2026-116675 · Severity: high · CVSS 4 · Published 2026-10-27

TinyMCE is a rich text editor used in web applications to let users compose formatted content. The media plugin creates DOM elements before sanitizing user input, allowing attackers to inject malicious scripts that execute in other users' browsers. An attacker with access to the editor can craft content that stores and replays attacks against anyone viewing the compromised content.

Technologies: [tinymce (npm)](https://junglewise.ai/threats/technologies/tinymce), [TinyMCE (NuGet)](https://junglewise.ai/threats/technologies/nuget-tinymce), [tinymce/tinymce (Packagist)](https://junglewise.ai/threats/technologies/tinymce-tinymce). Vendors: [npm](https://junglewise.ai/threats/vendors/npm), [NuGet](https://junglewise.ai/threats/vendors/nuget), [Packagist](https://junglewise.ai/threats/vendors/packagist), [TinyMCE](https://junglewise.ai/threats/vendors/tinymce).

## Quick answers

**Is CVE-2026-116675 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-116675 being exploited in the wild.

**How severe is CVE-2026-116675?** High severity, with a CVSS score of 4, published 27 October 2026.

**Which products and versions are affected?** tinymce (npm) >= 8.5.1, < 8.9.3, SEMVER:introduced=8.5.1,fixed=8.9.3; TinyMCE (NuGet) >= 8.5.1, < 8.9.3, ECOSYSTEM:introduced=8.5.1,fixed=8.9.3; tinymce/tinymce (Packagist) >= 8.5.1, < 8.9.3, ECOSYSTEM:introduced=8.5.1,fixed=8.9.3; TinyMCE 7.9.3 to 7.9.4, 8.5.1 to 8.9.3.

**Is there a fix for CVE-2026-116675?** Yes. tinymce (npm): upgrade to 8.9.3 or later; TinyMCE (NuGet): upgrade to 8.9.3 or later; tinymce/tinymce (Packagist): upgrade to 8.9.3 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-116675 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-116675?** Check whether you run tinymce (npm), TinyMCE (NuGet), tinymce/tinymce (Packagist) or one of the others listed 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

- tinymce (npm): upgrade to 8.9.3 or later

  ```sh
  npm install tinymce@8.9.3
  ```

- TinyMCE (NuGet): upgrade to 8.9.3 or later

  ```sh
  dotnet add package TinyMCE --version 8.9.3
  ```

- tinymce/tinymce (Packagist): upgrade to 8.9.3 or later

  ```sh
  composer require tinymce/tinymce:^8.9.3
  ```


## Technical details

The media plugin processes data-mce-object attributes and creates DOM elements before content sanitization occurs, allowing onload and onerror event handlers to execute arbitrary JavaScript. The vulnerability affects versions 7.9.3–7.9.4 and 8.5.1–8.9.3 and results in stored cross-site scripting (XSS) that persists in edited documents. Fixes are available in versions 7.9.4 and 8.9.3.

## Affected products

- TinyMCE TinyMCE 7.9.3 to 7.9.4, 8.5.1 to 8.9.3

## Identifiers

- CVE-2026-116675
- GHSA-mf2p-h6hf-fcwm

## Timeline

- 2026-10-27: disclosed

## References

- [https://github.com/tinymce/tinymce/commit/bd1ab5ef024c648c3f9c0b409e54a6c227c7d8a2](https://github.com/tinymce/tinymce/commit/bd1ab5ef024c648c3f9c0b409e54a6c227c7d8a2)
- [https://github.com/tinymce/tinymce/releases/tag/8.9.3](https://github.com/tinymce/tinymce/releases/tag/8.9.3)

## Related threats

- [PYSEC-2026-1301 - TinyMCE Cross-Site Scripting (XSS) vulnerability using noneditable_regexp option](https://junglewise.ai/threats/cve-2024-38356-tinymce-cross-site-scripting-in-noneditable-regexp)
- [PYSEC-2026-1302 - TinyMCE Cross-Site Scripting (XSS) vulnerability using noscript elements](https://junglewise.ai/threats/cve-2024-38357-tinymce-cross-site-scripting-in-noscript-element-parsing)
- [PYSEC-2026-632 - Cross-site scripting vulnerability in TinyMCE plugins](https://junglewise.ai/threats/cve-2024-21910-tinymce-cross-site-scripting-in-image-and-link-plugins)
- [Tiny Technologies TinyMCE stored XSS via forged mce:protected comments](https://junglewise.ai/threats/cve-2026-47762-tiny-technologies-tinymce-stored-xss-via-forged-mce-protected)
- [Tiny Technologies TinyMCE stored XSS in media plugin](https://junglewise.ai/threats/cve-2026-47761-tiny-technologies-tinymce-stored-xss-in-media-plugin)