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CVE-2026-47760

TinyMCE Cross-Site Scripting (XSS) vulnerability using sanitization bypass through nested SVGs

8.7 HighFix available

TinyMCE is an open source rich text editor. From 6.8.0 to before 7.1.0, TinyMCE contains an XSS vulnerability caused by improper SVG namespace scope handling in the sanitizer. A crafted payload using nested elements can bypass attribute sanitization and execute arbitrary JavaScript. This vulnerability is fixed in 7.1.0.

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

0.19%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 sanitization bypass through nested SVGs

TinyMCE is an open source rich text editor. From 6.8.0 to before 7.1.0, TinyMCE contains an XSS vulnerability caused by improper SVG namespace scope handling in the sanitizer. A crafted payload using nested elements can bypass attribute sanitization and execute arbitrary JavaScript. This vulnerability is fixed in 7.1.0.

Record
CVE-2026-47760
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-2026-32920 8.7

TinyMCE is an open source rich text editor. From 6.8.0 to before 7.1.0, TinyMCE contains an XSS vulnerability caused by improper SVG namespace scope handling in the sanitizer. A crafted payload using nested elements can bypass attribute sanitization and execute arbitrary JavaScript. This vulnerability is fixed in 7.1.0.

Record
EUVD-2026-32920
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-mh5m-5hw4-5c69 8.7

TinyMCE Cross-Site Scripting (XSS) vulnerability using sanitization bypass through nested SVGs

Impact

TinyMCE 6.8.x contains an XSS vulnerability caused by improper SVG namespace scope handling in the sanitizer. A crafted payload using nested <svg> elements can bypass attribute sanitization and execute arbitrary JavaScript.

Patches

This issue affects TinyMCE 6.8.x-7.0.x. The vulnerability is fixed in TinyMCE 7.1.0 and later.

Workarounds

No official workaround available.

Acknowledgements

Tiny thanks maple3142 (https://maple3142.net) of DEVCORE for their help identifying this vulnerability.

References

Fix introduced in TinyMCE 7.1.0 though a rewrite of code causing the vulnerability.

Record
GHSA-mh5m-5hw4-5c69
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. From 6.8.0 to before 7.1.0, TinyMCE contains an XSS vulnerability caused by improper SVG namespace scope handling in the sanitizer. A crafted payload using nested elements can bypass attribute sanitization and execute arbitrary JavaScript. This vulnerability is fixed in 7.1.0.

Record
CVE-2026-47760
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 sanitization bypass through nested SVGs

TinyMCE is an open source rich text editor. From 6.8.0 to before 7.1.0, TinyMCE contains an XSS vulnerability caused by improper SVG namespace scope handling in the sanitizer. A crafted payload using nested elements can bypass attribute sanitization and execute arbitrary JavaScript. This vulnerability is fixed in 7.1.0.

Record
CVE-2026-47760
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-mh5m-5hw4-5c69 8.7

TinyMCE Cross-Site Scripting (XSS) vulnerability using sanitization bypass through nested SVGs

Impact

TinyMCE 6.8.x contains an XSS vulnerability caused by improper SVG namespace scope handling in the sanitizer. A crafted payload using nested <svg> elements can bypass attribute sanitization and execute arbitrary JavaScript.

Patches

This issue affects TinyMCE 6.8.x-7.0.x. The vulnerability is fixed in TinyMCE 7.1.0 and later.

Workarounds

No official workaround available.

Acknowledgements

Tiny thanks maple3142 (https://maple3142.net) of DEVCORE for their help identifying this vulnerability.

References

Fix introduced in TinyMCE 7.1.0 though a rewrite of code causing the vulnerability.

Record
GHSA-mh5m-5hw4-5c69
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
OSVUBUNTU-CVE-2026-47760 8.7

TinyMCE is an open source rich text editor. From 6.8.0 to before 7.1.0, TinyMCE contains an XSS vulnerability caused by improper SVG namespace scope handling in the sanitizer. A crafted payload using nested elements can bypass attribute sanitization and execute arbitrary JavaScript. This vulnerability is fixed in 7.1.0.

Record
UBUNTU-CVE-2026-47760
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

Affected products

Affected packages

Affected packages
PackageAffectedFixed
tinymce
npm
 6.8.0 up to 7.1.0
7.1.0
TinyMCE
NuGet
 6.8.0 up to 7.1.0
7.1.0
tinymce/tinymce
Packagist
 6.8.0 up to 7.1.0
7.1.0
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
TinyMCE
NuGet
 6.8.0 up to 7.1.0, plus listed versions
6.8.16.8.26.8.36.8.46.8.56.8.67.0.07.0.1
7.1.0
tinymce/tinymce
Packagist
 6.8.0 up to 7.1.0, plus listed versions
6.8.16.8.26.8.36.8.46.8.56.8.67.0.07.0.1
7.1.0
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
aliases, publishedEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

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

In short

CVE-2026-47760 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 0.19%, the 8th percentile. Fixed in tinymce 7.1.0.

References

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