High 8.5Published Oct 27, 2026

CVE-2026-116675TinyMCE Cross-Site Scripting (XSS) vulnerability using media plugin `data-mce-object` serialization

Updated under an hour ago (Oct 28, 2026, 1:10 PM ET)

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It affects tinymce. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.

CVSS: 8.5 HIGH (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Weakness (CWE): CWE-79
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Awaiting Analysis
Record last updated: Oct 28, 2026
First seen by InfoSec Signals: Oct 27, 2026

Affected products

Affected products

tinymce tinymce tinymce:tinymce (from the name)	from 8.5.1, < 8.9.3; from 7.9.3, < 7.9.4	CNA record

References

References

https://github.com/tinymce/tinymce/security/advisories/GHSA-mf2p-h6hf-fcwm	x-refsource-confirm
https://github.com/tinymce/tinymce/commit/bd1ab5ef024c648c3f9c0b409e54a6c227c7d8a2	x-refsource-misc
https://github.com/tinymce/tinymce/releases/tag/8.9.3	x-refsource-misc
https://www.tiny.cloud/docs/tinymce/7/7.9.4-release-notes/#overview	x-refsource-misc
https://www.tiny.cloud/docs/tinymce/latest/8.9.3-release-notes/#overview	x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.