CVE-2026-47345

UNKNOWN 0.0

TYPO3 HTML Sanitizer allows Cross-Site Scripting

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

Namespace attributes are not encoded correctly during HTML serialization. This allows bypassing the cross-site scripting prevention mechanism of typo3/html-sanitizer before version 2.3.2.

CWE	CWE-79
Vendor	typo3
Product	html sanitizer
Published	Jun 8, 2026
Last Updated	Jun 8, 2026

Stay Ahead of the Next One

Get instant alerts for typo3 html sanitizer

Be the first to know when new unknown vulnerabilities affecting typo3 html sanitizer are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

Affected Versions

TYPO3 / HTML Sanitizer

0 < 2.3.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

typo3.org: https://typo3.org/security/advisory/typo3-core-sa-2026-006 github.com: https://github.com/TYPO3/html-sanitizer/commit/8b5d0be44ded457ca993ec9ca93d859941c63764

Credits

🔍 Doyensec in collaboration with Claude and Anthropic Research Benjamin Franzke