CVE-2026-47759: TinyMCE is an open source rich text editor

Routine

HIGH 8.7UPGRADE

CVE-2026-47759 is a high-severity flaw (CVSS 8.7) affecting tinymce. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.7 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.3% (top 79%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-05-28
Last modified	2026-10-14

Publisher (CNA): GitHub, Inc. · Vendor: tiny

Last updated 2026-10-14 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-28 16:16 UTCPublished CVE record published
2026-10-14 20:10 UTCUpdated Record last modified

tiny tinymce UPGRADE

Affected: < 5.11.1 · >= 6.0.0 and < 7.9.3 · >= 8.0.0 and < 8.5.1

Fixed in: 5.11.1, 7.9.3, 8.5.1

Safe to downgrade to: a release before 6.0.0

1. Check installed version

apt-cache policy tinymce || rpm -q tinymce || tinymce --version

2. UPGRADE to 5.11.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade tinymce

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade tinymce

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 6.0.0 (Debian / Ubuntu)

apt-cache madison tinymce sudo apt install tinymce=<VERSION_BEFORE_6.0.0> sudo apt-mark hold tinymce

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list tinymce sudo dnf downgrade tinymce-<VERSION_BEFORE_6.0.0> sudo dnf versionlock add tinymce

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-47759?

tinymce: upgrade to 5.11.1, 7.9.3, 8.5.1. Exact commands for each OS are on this page.

Is CVE-2026-47759 being exploited?

CVE-2026-47759 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-47759 affect?

CVE-2026-47759 affects tinymce. Severity is high (CVSS 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 val

How urgent is CVE-2026-47759?

Priority 36/100. High severity

Related CVEs

CVE-2026-47762 HIGH 8.7 UPGRADE TinyMCE is an open source rich text editor
CVE-2026-47761 HIGH 8.7 UPGRADE TinyMCE is an open source rich text editor
CVE-2026-47760 HIGH 8.7 UPGRADE TinyMCE is an open source rich text editor

References

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