CVE-2026-47344: TYPO3 Html Sanitizer

Low severity, CVSS 2.1. EPSS: 0.4% chance of exploitation in the next 30 days.

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.

Affected products

• TYPO3 Html Sanitizer: before 2.3.2 (fixed in 2.3.2)

Published 2026-06-08. Last modified 2026-07-23.