CVE-2026-47344Low▾ SunlitTYPO3 HTML Sanitizer allows Cross-site Scripting
▾ Sunlit zone — Low / medium · no exploitation signal
impact 13.8 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Aug 2.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via GHSA
0.3%
0.3% → 0.4%
When ALLOW_INSECURE_RAW_TEXT is enabled, whitespace-variant closing tags (e.g., </style\\t>) are not recognized by the sanitizer but accepted by browsers as valid end tags, allowing subsequent content to escape sanitization. This allows bypassing the cross-site scripting prevention mechanism of typo3/html-sanitizer before version 2.3.2.
Credits to IPC Labs 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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