CVE-2026-116675 TinyMCE Cross-Site Scripting (XSS) vulnerability using media plugin `data-mce-object` serialization
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-116675?
CVE-2026-116675 is a high-severity vulnerability in tinymce, published on 27 Oct 2026.
Official description
TinyMCE is an open source rich text editor. From 7.9.3 until 7.9.4 and from 8.5.1 until 8.9.3, the media plugin creates elements crafted through data-mce-object in the active document before sanitization. Those elements can execute malicious scripts during processing, resulting in stored cross-site scripting for users with the media plugin enabled. This issue is fixed in versions 8.9.3 and 7.9.4.
Weakness: CWE-79
Which versions are affected by CVE-2026-116675?
12 open source packages ship an affected version, including TinyMCE, tinymce/tinymce and tinymce.
| Package | Affected | Fixed in |
|---|---|---|
TinyMCE NuGet | From 7.9.3 | 7.9.4 |
TinyMCE NuGet | From 7.9.3 | 7.9.4 |
TinyMCE NuGet | From 8.5.1 | 8.9.3 |
TinyMCE NuGet | From 8.5.1 | 8.9.3 |
tinymce/tinymce Packagist | From 7.9.3 | 7.9.4 |
tinymce/tinymce Packagist | From 7.9.3 | 7.9.4 |
6 more packages
tinymce/tinymce Packagist | From 8.5.1 | 8.9.3 |
tinymce/tinymce Packagist | From 8.5.1 | 8.9.3 |
tinymce npm | From 7.9.3 | 7.9.4 |
tinymce npm | From 7.9.3 | 7.9.4 |
tinymce npm | From 8.5.1 | 8.9.3 |
tinymce npm | From 8.5.1 | 8.9.3 |
How do I fix CVE-2026-116675?
Upgrade TinyMCE to a fixed version for your release line: 7.9.4 or 8.9.3.
Is CVE-2026-116675 being exploited?
There is no known exploitation of CVE-2026-116675 in the wild and no public exploit code.
Sources
Also known as GHSA-mf2p-h6hf-fcwm, UBUNTU-CVE-2026-116675.