CVE-2026-47344

LOW

TYPO3 HTML Sanitizer allows Cross-Site Scripting

Title source: cna

Description

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.

References (2)

Core 2

Core References

Vendor Advisory vendor-advisory

https://typo3.org/security/advisory/typo3-core-sa-2026-006

Patch patch

https://github.com/TYPO3/html-sanitizer/commit/bd1a88d9b5a5f67f1120ec41084e9c1a0675641c

View Patch ZIP pw:eip

Scores

CVSS v4 2.1

EPSS 0.0028

EPSS Percentile 19.7%

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-436 CWE-79

Status published

Products (2)

TYPO3/HTML Sanitizer < 2.3.2

typo3/html-sanitizer 0 - 2.3.2Packagist

Published Jun 08, 2026

Tracked Since Jun 09, 2026