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Fencer Intel
high 8.5

CVE-2026-116675 json

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

published 13d ago modified 12d ago also EUVD-2026-111106 , GHSA-mf2p-h6hf-fcwm

cvss
8.5
version 4.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 28%
public exploits
0
none known

Summary

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.

Patch / fix

  • npm tinymce 7.9.4, 8.9.3
  • nuget TinyMCE 7.9.4, 8.9.3
  • packagist tinymce/tinymce 7.9.4, 8.9.3
  • tiny tinymce 7.9.4, 8.9.3

Is CVE-2026-116675 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-116675 updated cvss 5.4

tinymce: tinymce: Stored cross-site scripting via unsanitized media plugin elements

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
12d ago

Exploit prediction

0.35% chance of exploitation in the next 30 days, higher than 28% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 4.0 8.5 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
CNA 4.0 8.5 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected packages

ecosystem package affected fixed in
npm tinymce
>=8.5.1, <8.9.3
>=7.9.3, <7.9.4
8.9.3
7.9.4
nuget TinyMCE
>=8.5.1, <8.9.3
>=7.9.3, <7.9.4
8.9.3
7.9.4
packagist tinymce/tinymce
>=8.5.1, <8.9.3
>=7.9.3, <7.9.4
8.9.3
7.9.4

Affected products

  • tinymce tinymce

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.