GHSA-mf2p-h6hf-fcwm

Suggest an improvement
Source
https://github.com/advisories/GHSA-mf2p-h6hf-fcwm
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-mf2p-h6hf-fcwm/GHSA-mf2p-h6hf-fcwm.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-mf2p-h6hf-fcwm
Aliases
  • CVE-2026-116675
Published
2026-10-27T21:07:12Z
Modified
2026-10-27T21:15:04Z
Severity
  • 8.5 (High) CVSS_V4 - 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 CVSS Calculator
Summary
TinyMCE Cross-Site Scripting (XSS) vulnerability using media plugin `data-mce-object` serialization
Details

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 and David Vieira Kurz (HiSolutions AG) for their help identifying this vulnerability.

Database specific 
{
    "cwe_ids":  [
        "CWE-79"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-10-27T21:07:12Z",
    "nvd_published_at":  "2026-10-27T17:16:59Z",
    "severity":  "HIGH"
}
References

Affected packages

npm
tinymce

Package

Name
tinymce
View open source insights on deps.dev
Purl
pkg:npm/tinymce

Affected ranges

Type
SEMVER
Events
Introduced
8.5.1
Fixed
8.9.3

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-mf2p-h6hf-fcwm/GHSA-mf2p-h6hf-fcwm.json"
tinymce

Package

Name
tinymce
View open source insights on deps.dev
Purl
pkg:npm/tinymce

Affected ranges

Type
SEMVER
Events
Introduced
7.9.3
Fixed
7.9.4

Affected versions

7.*
7.9.3

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-mf2p-h6hf-fcwm/GHSA-mf2p-h6hf-fcwm.json"
NuGet
TinyMCE

Package

Name
TinyMCE
View open source insights on deps.dev
Purl
pkg:nuget/TinyMCE

Affected ranges

Type
ECOSYSTEM
Events
Introduced
8.5.1
Fixed
8.9.3

Affected versions

8.*
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

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-mf2p-h6hf-fcwm/GHSA-mf2p-h6hf-fcwm.json"
TinyMCE

Package

Name
TinyMCE
View open source insights on deps.dev
Purl
pkg:nuget/TinyMCE

Affected ranges

Type
ECOSYSTEM
Events
Introduced
7.9.3
Fixed
7.9.4

Affected versions

7.*
7.9.3

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-mf2p-h6hf-fcwm/GHSA-mf2p-h6hf-fcwm.json"
Packagist
tinymce/tinymce

Package

Name
tinymce/tinymce
Purl
pkg:composer/tinymce/tinymce

Affected ranges

Type
ECOSYSTEM
Events
Introduced
8.5.1
Fixed
8.9.3

Affected versions

8.*
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

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-mf2p-h6hf-fcwm/GHSA-mf2p-h6hf-fcwm.json"
tinymce/tinymce

Package

Name
tinymce/tinymce
Purl
pkg:composer/tinymce/tinymce

Affected ranges

Type
ECOSYSTEM
Events
Introduced
7.9.3
Fixed
7.9.4

Affected versions

7.*
7.9.3

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-mf2p-h6hf-fcwm/GHSA-mf2p-h6hf-fcwm.json"