CVE-2026-47759: TinyMCE Cross-Site Scripting (XSS) vulnerability using through data-mce- prefixed src, href, style attributes

June 5, 2026 (updated July 7, 2026)

Stored XSS vulnerability via unsanitized data-mce-* attributes (data-mce-href, data-mce-src, data-mce-style). Allows attackers to inject malicious values that override safe attributes during serialization, bypassing validation.

References

github.com/advisories/GHSA-q742-qvgc-gc2f
github.com/tinymce/tinymce/security/advisories/GHSA-q742-qvgc-gc2f
nvd.nist.gov/vuln/detail/CVE-2026-47759
www.tiny.cloud/docs/tinymce/7/7.9.3-release-notes/
www.tiny.cloud/docs/tinymce/8/8.5.1-release-notes/

Code Behaviors & Features

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