CVE-2026-47345Medium▾ SunlitTYPO3 HTML Sanitizer allows Cross-site Scripting
▾ Sunlit zone — Low / medium · no exploitation signal
impact 27.5 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Jul 7.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via GHSA
0.4%
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.
Credits to Doyensec in collaboration with Claude and Anthropic Research for reporting this vulnerability.
typo3/html-sanitizer < 2.3.2Upgrade to a patched release:
typo3/html-sanitizer 2.3.2Connected by shared product, vendor, weakness, or advisory.
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