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CVE-2026-47759

TinyMCE Cross-Site Scripting (XSS) vulnerability using through data-mce- prefixed src, href, style attributes

8.7 HighFix available

TinyMCE is an open source rich text editor. Prior to 5.11.1, 7.9.3, and 8.5.1, there is a stored 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. This vulnerability is fixed in 5.11.1, 7.9.3, and 8.5.1.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
Low
User interaction
Required

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
None

Exploit likelihood

0.28%Up 0.2 points since May 29, 2026
90%50%10%1%

What each source reports

CVE List Score used 8.7

TinyMCE Cross-Site Scripting (XSS) vulnerability using through data-mce- prefixed src, href, style attributes

TinyMCE is an open source rich text editor. Prior to 5.11.1, 7.9.3, and 8.5.1, there is a stored 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. This vulnerability is fixed in 5.11.1, 7.9.3, and 8.5.1.

Record
CVE-2026-47759
CVSS 3.1
8.7 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
Weakness
CWE-79
Updated
2026-11-02
EUVDEUVD-2026-32921 8.7

TinyMCE is an open source rich text editor. Prior to 5.11.1, 7.9.3, and 8.5.1, there is a stored 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. This vulnerability is fixed in 5.11.1, 7.9.3, and 8.5.1.

Record
EUVD-2026-32921
CVSS 3.1
8.7 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-q742-qvgc-gc2f 8.7

TinyMCE Cross-Site Scripting (XSS) vulnerability using through data-mce- prefixed src, href, style attributes

Impact

Stored 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.

Patches

Patched by stripping unsafe data-mce-* attributes during parsing. Users should upgrade to the latest patched versions (5 LTS, 7.x, 8.x).

Workarounds

No official workaround available.

Fix

To avoid this vulnerability:

Upgrade to TinyMCE 8.5.1 or higher. Upgrade to TinyMCE 7.9.3 or higher. Upgrade to TinyMCE 5.11.1 LTS or higher for TinyMCE 5.x (only available as part of commercial long-term support contract).

Acknowledgements

Tiny thanks Tadi Kadango (website) and Ivan Babenko for their help identifying this vulnerability.

Record
GHSA-q742-qvgc-gc2f
CVSS 3.1
8.7 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
Weakness
CWE-79
Updated
2026-11-02
NVD 8.7

TinyMCE is an open source rich text editor. Prior to 5.11.1, 7.9.3, and 8.5.1, there is a stored 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. This vulnerability is fixed in 5.11.1, 7.9.3, and 8.5.1.

Record
CVE-2026-47759
CVSS 3.1
8.7 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
CVSS 3.1
5.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Weakness
CWE-79
Updated
2026-11-02
OSV 8.7

TinyMCE Cross-Site Scripting (XSS) vulnerability using through data-mce- prefixed src, href, style attributes

TinyMCE is an open source rich text editor. Prior to 5.11.1, 7.9.3, and 8.5.1, there is a stored 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. This vulnerability is fixed in 5.11.1, 7.9.3, and 8.5.1.

Record
CVE-2026-47759
CVSS 3.1
8.7 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
Weakness
CWE-79
Updated
2026-11-02
OSVGHSA-q742-qvgc-gc2f 8.7

TinyMCE Cross-Site Scripting (XSS) vulnerability using through data-mce- prefixed src, href, style attributes

Impact

Stored 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.

Patches

Patched by stripping unsafe data-mce-* attributes during parsing. Users should upgrade to the latest patched versions (5 LTS, 7.x, 8.x).

Workarounds

No official workaround available.

Fix

To avoid this vulnerability:

Upgrade to TinyMCE 8.5.1 or higher. Upgrade to TinyMCE 7.9.3 or higher. Upgrade to TinyMCE 5.11.1 LTS or higher for TinyMCE 5.x (only available as part of commercial long-term support contract).

Acknowledgements

Tiny thanks Tadi Kadango (website) and Ivan Babenko for their help identifying this vulnerability.

Record
GHSA-q742-qvgc-gc2f
CVSS 3.1
8.7 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
Weakness
CWE-79
Updated
2026-11-02
Show 4 moreShow less
OSVUBUNTU-CVE-2026-47759 8.7

TinyMCE is an open source rich text editor. Prior to 5.11.1, 7.9.3, and 8.5.1, there is a stored 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. This vulnerability is fixed in 5.11.1, 7.9.3, and 8.5.1.

Record
UBUNTU-CVE-2026-47759
CVSS 3.1
8.7 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
CVSS 3.1
5.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Updated
2026-11-02
OSVCLSA-2026-1781052744 No score

TuxCare security update for tinymce (4 CVEs)

TuxCare rebuilt tinymce to address 4 CVEs. Fixed in 6.8.6-tuxcare.4.

Record
CLSA-2026-1781052744
Updated
2026-11-02
OSVCLSA-2026-1783904630 No score

TuxCare security update for tinymce (3 CVEs)

TuxCare rebuilt tinymce to address 3 CVEs. Fixed in 4.9.11-tuxcare.2.

Record
CLSA-2026-1783904630
Updated
2026-11-02
OSVCLSA-2026-1784077492 No score

TuxCare security update for tinymce (3 CVEs)

TuxCare rebuilt tinymce to address 3 CVEs. Fixed in 5.10.9-tuxcare.2.

Record
CLSA-2026-1784077492
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
tinymce
npm
 6.0.0 up to 7.9.3
7.9.3
tinymce
npm
 8.0.0 up to 8.5.1
8.5.1
TinyMCE
NuGet
 6.0.0 up to 7.9.3
7.9.3
TinyMCE
NuGet
 8.0.0 up to 8.5.1
8.5.1
tinymce/tinymce
Packagist
 6.0.0 up to 7.9.3
7.9.3
tinymce/tinymce
Packagist
 8.0.0 up to 8.5.1
8.5.1
tinymce
npm
 through 5.10.9 None known
TinyMCE
NuGet
 through 5.10.9 None known
tinymce/tinymce
Packagist
 through 5.10.9 None known
tinymce
TuxCare:npm
From an advisory covering 4 CVEs
 6.8.6-tuxcare.0 up to 6.8.6-tuxcare.4, plus listed versions
6.8.66.8.6-tuxcare.16.8.6-tuxcare.26.8.6-tuxcare.3
6.8.6-tuxcare.4
Show 11 moreShow less
Affected packages
PackageAffectedFixed
tinymce
TuxCare:npm
From an advisory covering 3 CVEs
 4.9.11-tuxcare.0 up to 4.9.11-tuxcare.2, plus listed versions
4.9.114.9.11-tuxcare.1
4.9.11-tuxcare.2
tinymce
TuxCare:npm
From an advisory covering 3 CVEs
 5.10.9-tuxcare.0 up to 5.10.9-tuxcare.2, plus listed versions
5.10.95.10.9-tuxcare.1
5.10.9-tuxcare.2
TinyMCE
NuGet
 through 5.10.9, plus listed versions
3.4.3.23.4.43.4.53.4.73.5.0
Show 45 moreShow less
3.5.0.13.5.13.5.1.13.5.23.5.33.5.43.5.4.13.5.53.5.63.5.73.5.84.0.04.0.14.0.104.0.114.0.134.0.144.0.154.0.164.0.174.0.184.0.194.0.24.0.204.0.214.0.224.0.234.0.244.0.254.0.264.0.274.0.284.0.44.0.54.0.64.0.84.0.94.1.04.1.14.1.104.1.24.1.34.1.44.1.54.1.6
 None known
TinyMCE
NuGet
 6.0.0 up to 7.9.3, plus listed versions
6.0.16.0.26.0.36.1.06.1.1
Show 43 moreShow less
6.1.26.2.06.3.06.3.16.3.26.4.06.4.16.4.26.5.06.5.16.6.26.7.06.7.16.7.26.7.36.8.06.8.16.8.26.8.36.8.46.8.56.8.67.0.07.0.17.1.07.1.17.1.27.2.07.2.17.3.07.4.07.4.17.5.07.5.17.6.07.6.17.7.07.7.17.7.27.8.07.9.07.9.17.9.2
7.9.3
TinyMCE
NuGet
 8.0.0 up to 8.5.1, plus listed versions
8.0.18.0.28.1.08.1.18.1.2
Show 8 moreShow less
8.2.08.2.18.2.28.3.08.3.18.3.28.4.08.5.0
8.5.1
tinymce/tinymce
Packagist
 through 5.10.9, plus listed versions
4.0.04.0.14.0.104.0.114.0.12
Show 45 moreShow less
4.0.134.0.144.0.154.0.164.0.174.0.184.0.194.0.24.0.204.0.214.0.224.0.234.0.244.0.254.0.264.0.274.0.284.0.34.0.44.0.54.0.64.0.74.0.84.0.94.1.04.1.14.1.104.1.24.1.34.1.44.1.54.1.64.1.74.1.84.1.94.2.04.2.14.2.24.2.34.2.44.2.54.2.64.2.74.2.84.3.0
 None known
tinymce/tinymce
Packagist
 6.0.0 up to 7.9.3, plus listed versions
6.0.16.0.26.0.36.1.06.1.1
Show 45 moreShow less
6.1.26.2.06.3.06.3.16.3.26.4.06.4.16.4.26.5.06.5.16.6.06.6.16.6.26.7.06.7.16.7.26.7.36.8.06.8.16.8.26.8.36.8.46.8.56.8.67.0.07.0.17.1.07.1.17.1.27.2.07.2.17.3.07.4.07.4.17.5.07.5.17.6.07.6.17.7.07.7.17.7.27.8.07.9.07.9.17.9.2
7.9.3
tinymce/tinymce
Packagist
 8.0.0 up to 8.5.1, plus listed versions
8.0.18.0.28.1.08.1.18.1.2
Show 8 moreShow less
8.2.08.2.18.2.28.3.08.3.18.3.28.4.08.5.0
8.5.1
tinymce
Ubuntu:16.04:LTS
 All versions, plus listed versions
3.4.8+dfsg0-1
 None known
tinymce
Ubuntu:18.04:LTS
 All versions, plus listed versions
3.4.8+dfsg0-2
 None known
tinymce
Ubuntu:20.04:LTS
 All versions, plus listed versions
3.4.8+dfsg0-2
 None known

History

History
RecordedChangedSources
affected, facts
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-47759 is a high vulnerability (CVSS 8.7) in Tiny Tinymce, published May 28, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.28%, the 20th percentile. Fixed in tinymce 7.9.3.

References

This page doesn't list everything

Left out here: 253 versions. The JSON record has them.

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