CVE-2026-47760 — Vulnerability in tinymce — CVE Details

HIGH

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

Published June 5, 2026Updated September 10, 2026Source: osv

Summary

### Impact TinyMCE 6.8.x contains an XSS vulnerability caused by improper SVG namespace scope handling in the sanitizer. A crafted payload using nested <svg> elements can bypass attribute sanitization and execute arbitrary JavaScript. ### Patches This issue affects TinyMCE 6.8.x-7.0.x. The vulnerability is fixed in TinyMCE 7.1.0 and later. ### Workarounds No official workaround available. ### Acknowledgements Tiny thanks [maple3142](https://github.com/maple3142) (<https://maple3142.net>) of DEVCORE for their help identifying this vulnerability. ### References Fix introduced in TinyMCE 7.1.0 though a rewrite of code causing the vulnerability.

Advisory Timeline

First published June 5, 2026 (129 days ago).
Last revised September 10, 2026 — 96 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

npm

Update tinymce to 7.1.0 or later

npm install tinymce@7.1.0

Composer

Update tinymce/tinymce to 7.1.0 or later

composer require "tinymce/tinymce:^7.1.0"

NuGet

Update TinyMCE to 7.1.0 or later

dotnet add package TinyMCE --version 7.1.0

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (3)

Affects 3 ecosystems: npm (1), nuget (1), packagist (1).

Package	Ecosystem	Affected	Fixed In
tinymce	npm	All versions	7.1.0
tinymce/tinymce	packagist	6.8.0, 6.8.1, 6.8.2, 6.8.3 (+5 more)	7.1.0
TinyMCE	nuget	6.8.0, 6.8.1, 6.8.2, 6.8.3 (+5 more)	7.1.0

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CWE-79
Cross-site Scripting (XSS)MITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 8.7 score means for each attack dimension.

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

High

Integrity

High

Availability

None

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

References

Frequently Asked Questions

What is CVE-2026-47760?: TinyMCE Cross-Site Scripting (XSS) vulnerability using sanitization bypass through nested SVGs This vulnerability has been assigned a severity rating of HIGH (CVSS score: 8.7/10).
How do I check if my project is affected by CVE-2026-47760?: CVE-2026-47760 affects tinymce, tinymce/tinymce and TinyMCE. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2026-47760 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score

8.7

High exploitability or significant impact. Prioritize remediation within days.

Also Known As

GHSA-mh5m-5hw4-5c69

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