CVE-2026-47760 TinyMCE Cross-Site Scripting (XSS) vulnerability using sanitization bypass through nested SVGs

High 8.7 Published 28 May 2026 Updated 2 Jun 2026

Attackers can execute arbitrary JavaScript via crafted nested SVG payloads due to sanitizer bypass in TinyMCE rich text editor.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: Available

What is CVE-2026-47760?

CVE-2026-47760 is a high-severity cross-site scripting vulnerability in tinymce, published on 28 May 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

TinyMCE is an open source rich text editor. From 6.8.0 to before 7.1.0, TinyMCE contains an XSS vulnerability caused by improper SVG namespace scope handling in the sanitizer. A crafted payload using nested elements can bypass attribute sanitization and execute arbitrary JavaScript. This vulnerability is fixed in 7.1.0.

Weakness: CWE-79

Which versions are affected by CVE-2026-47760?

6 open source packages ship an affected version, including TinyMCE, tinymce/tinymce and tinymce. It affects 1 product.

Package	Affected	Fixed in
`TinyMCE` NuGet	From `6.8.0`	`7.1.0`
`TinyMCE` NuGet	From `6.8.0`	`7.1.0`
`tinymce/tinymce` Packagist	From `6.8.0`	`7.1.0`
`tinymce/tinymce` Packagist	From `6.8.0`	`7.1.0`
`tinymce` npm	From `6.8.0`	`7.1.0`
`tinymce` npm	From `6.8.0`	`7.1.0`

Products include Tiny Tinymce.

How do I fix CVE-2026-47760?

Upgrade TinyMCE to 7.1.0 or later.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2026-47760 being exploited?

There is no known exploitation of CVE-2026-47760 in the wild and no public exploit code.

Sources

Also known as GHSA-mh5m-5hw4-5c69, UBUNTU-CVE-2026-47760.