{
"id": "GHSA-q742-qvgc-gc2f",
"aliases": [
"CVE-2026-47759"
],
"details": "### Impact\nStored 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.\n\n### Patches\nPatched by stripping unsafe data-mce-* attributes during parsing. Users should upgrade to the latest patched versions (5 LTS, 7.x, 8.x).\n\n### Workarounds\nNo official workaround available.\n\n### Fix\nTo avoid this vulnerability:\n\nUpgrade to TinyMCE 8.5.1 or higher.\nUpgrade to TinyMCE 7.9.3 or higher.\nUpgrade to TinyMCE 5.11.1 LTS or higher for TinyMCE 5.x (only available as part of commercial [long-term support](https://www.tiny.cloud/long-term-support/) contract).\n\n### Acknowledgements\nTiny thanks [Tadi Kadango](https://github.com/mtrill47) ([website](https://tadiwakadango.com/)) and [Ivan Babenko](https://github.com/he1d3n) for their help identifying this vulnerability.",
"summary": "TinyMCE Cross-Site Scripting (XSS) vulnerability using through data-mce- prefixed src, href, style attributes",
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"last_affected": "5.10.9"
}
]
}
],
"package": {
"name": "tinymce",
"ecosystem": "npm"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.0.0"
},
{
"fixed": "7.9.3"
}
]
}
],
"package": {
"name": "tinymce",
"ecosystem": "npm"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "8.0.0"
},
{
"fixed": "8.5.1"
}
]
}
],
"package": {
"name": "tinymce",
"ecosystem": "npm"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"last_affected": "5.10.9"
}
]
}
],
"package": {
"name": "TinyMCE",
"ecosystem": "NuGet"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.0.0"
},
{
"fixed": "7.9.3"
}
]
}
],
"package": {
"name": "TinyMCE",
"ecosystem": "NuGet"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "8.0.0"
},
{
"fixed": "8.5.1"
}
]
}
],
"package": {
"name": "TinyMCE",
"ecosystem": "NuGet"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"last_affected": "5.10.9"
}
]
}
],
"package": {
"name": "tinymce/tinymce",
"ecosystem": "Packagist"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.0.0"
},
{
"fixed": "7.9.3"
}
]
}
],
"package": {
"name": "tinymce/tinymce",
"ecosystem": "Packagist"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "8.0.0"
},
{
"fixed": "8.5.1"
}
]
}
],
"package": {
"name": "tinymce/tinymce",
"ecosystem": "Packagist"
}
}
],
"modified": "2026-07-07T17:10:01Z",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N"
}
],
"published": "2026-06-05T20:27:50Z",
"references": [
{
"url": "https://github.com/tinymce/tinymce/security/advisories/GHSA-q742-qvgc-gc2f",
"type": "WEB"
},
{
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-47759",
"type": "ADVISORY"
},
{
"url": "https://github.com/tinymce/tinymce",
"type": "PACKAGE"
},
{
"url": "https://www.tiny.cloud/docs/tinymce/7/7.9.3-release-notes/#overview",
"type": "WEB"
},
{
"url": "https://www.tiny.cloud/docs/tinymce/8/8.5.1-release-notes/#overview",
"type": "WEB"
}
],
"schema_version": "1.4.0",
"database_specific": {
"cwe_ids": [
"CWE-79"
],
"severity": "HIGH",
"github_reviewed": true,
"nvd_published_at": "2026-05-28T16:16:28Z",
"github_reviewed_at": "2026-06-05T20:27:50Z"
}
}