XSS in TYPO3 HTML Sanitizer
CVE-2026-47344
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.
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.003 (20.4th percentile) — read the EPSS interpretation.
Affected products
- Typo3 Html Sanitizer — versions 0
Weakness classification (CWE)
References
- f4fb688c-4412-4426-b4b8-421ecf27b14a (patch)
- f4fb688c-4412-4426-b4b8-421ecf27b14a (vendor-advisory)