HighFix available
TinyMCE Cross-Site Scripting (XSS) vulnerability using media plugin `data-mce-object` serialization
Type: advisorySources: OSV
### Impact Stored XSS vulnerability in the media plugin. Attackers can inject malicious scripts via elements crafted through the data-mce-object attribute, which are created and executed before sanitization. Impacts users of TinyMCE with the media plugin enabled. ### Patches This vulnerability has been patched in TinyMCE 8.9.3 and TinyMCE 7.9.4 by ensuring that, when using the media plugin, any content created through the data-mce-object attribute is properly sanitized first. ### Workarounds No official workaround available. ### Fix To avoid this vulnerability: Upgrade to TinyMCE 8.9.3 or higher. Upgrade to TinyMCE 7.9.4 or higher. ### Acknowledgements Tiny thanks [Fariskhi Vidyan](https://github.com/farisv) and David Vieira Kurz (HiSolutions AG) for their help identifying this vulnerability.
- Products
- TinyMCE, tinymce, tinymce/tinymce
- Affected versions
- 7.9.3, 8.5.1, 8.6.0, 8.7.0, 8.8.0, 8.8.1, 8.8.2, 8.9.0, 8.9.1, 8.9.2
- Fixed versions
- 7.9.4, 8.9.3
- CVEs
- CVE-2026-116675
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 2 Nov 2026, 14:56 UTC · Revision 1
Source evidence
TinyMCE Cross-Site Scripting (XSS) vulnerability using media plugin `data-mce-object` serialization
core-osv · Original sourcePublished 27 Oct 2026, 21:07 UTC
### Impact Stored XSS vulnerability in the media plugin. Attackers can inject malicious scripts via elements crafted through the data-mce-object attribute, which are created and executed before sanitization. Impacts users of TinyMCE with the media plugin enabled. ### Patches This vulnerability has been patched in TinyMCE 8.9.3 and TinyMCE 7.9.4 by ensuring that, when using the media plugin, any content created through the data-mce-object attribute is properly sanitized first. ### Workarounds No official workaround available. ### Fix To avoid this vulnerability: Upgrade to TinyMCE 8.9.3 or higher. Upgrade to TinyMCE 7.9.4 or higher. ### Acknowledgements Tiny thanks [Fariskhi Vidyan](https://github.com/farisv) and David Vieira Kurz (HiSolutions AG) for their help identifying this vulnerability.
osv:GHSA-mf2p-h6hf-fcwm
tinymce
Fixed versions: 8.9.3
TinyMCE
Fixed versions: 8.9.3
tinymce/tinymce
Fixed versions: 8.9.3
tinymce
Fixed versions: 7.9.4
TinyMCE
Fixed versions: 7.9.4
tinymce/tinymce
Fixed versions: 7.9.4
Complete source record
{
"id": "777f8d69873bd03d92f9ac158a5bd043bd232af3e2abc0e9e774bbedcc1488e8",
"url": "https://osv.dev/vulnerability/GHSA-mf2p-h6hf-fcwm",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "TinyMCE Cross-Site Scripting (XSS) vulnerability using media plugin `data-mce-object` serialization",
"summary": "### Impact Stored XSS vulnerability in the media plugin. Attackers can inject malicious scripts via elements crafted through the data-mce-object attribute, which are created and executed before sanitization. Impacts users of TinyMCE with the media plugin enabled. ### Patches This vulnerability has been patched in TinyMCE 8.9.3 and TinyMCE 7.9.4 by ensuring that, when using the media plugin, any content created through the data-mce-object attribute is properly sanitized first. ### Workarounds No official workaround available. ### Fix To avoid this vulnerability: Upgrade to TinyMCE 8.9.3 or higher. Upgrade to TinyMCE 7.9.4 or higher. ### Acknowledgements Tiny thanks [Fariskhi Vidyan](https://github.com/farisv) and David Vieira Kurz (HiSolutions AG) for their help identifying this vulnerability.",
"evidence": "osv:GHSA-mf2p-h6hf-fcwm",
"products": [
{
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"evidence": "/affected/0/ranges"
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{
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{
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"evidence": "/affected/4/versions"
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]
},
{
"name": {
"value": "tinymce/tinymce",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [
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],
"severity": "high",
"structured": {
"id": "GHSA-mf2p-h6hf-fcwm",
"aliases": [
"CVE-2026-116675",
"GHSA-mf2p-h6hf-fcwm"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "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"
}
],
"affected": [
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],
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"purl": "pkg:npm/tinymce",
"ecosystem": "npm"
},
"database_specific": {
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}
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{
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}
],
"package": {
"name": "TinyMCE",
"purl": "pkg:nuget/TinyMCE",
"ecosystem": "NuGet"
},
"versions": [
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},
{
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{
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}
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{
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},
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}
}
],
"modified": "2026-10-27T21:15:04.912450737Z",
"provider": "osv",
"references": [
"https://github.com/tinymce/tinymce/security/advisories/GHSA-mf2p-h6hf-fcwm",
"https://nvd.nist.gov/vuln/detail/CVE-2026-116675",
"https://github.com/tinymce/tinymce/commit/bd1ab5ef024c648c3f9c0b409e54a6c227c7d8a2",
"https://github.com/tinymce/tinymce",
"https://github.com/tinymce/tinymce/releases/tag/8.9.3",
"https://www.tiny.cloud/docs/tinymce/7/7.9.4-release-notes/#overview",
"https://www.tiny.cloud/docs/tinymce/latest/8.9.3-release-notes/#overview"
],
"provider_metadata": {
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"severity": "HIGH",
"github_reviewed": true,
"nvd_published_at": "2026-10-27T17:16:59Z",
"github_reviewed_at": "2026-10-27T21:07:12Z"
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"related_cves": [
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"evidence": "/aliases"
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"security_relevant": true,
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},
"source_id": "core-osv",
"document_id": 486108,
"published_at": "2026-10-27T21:07:12+00:00"
}