CVE-2026-47345

TYPO3 HTML Sanitizer allows Cross-Site Scripting

Published Jun 8, 2026 CVSS 4.0 · 5.1 Medium EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-p5j5-4j3q-8mq8 TYPO3 HTML Sanitizer allows Cross-site Scripting
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description 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.
Title TYPO3 HTML Sanitizer allows Cross-Site Scripting
First Time appeared Typo3
Typo3 html Sanitizer
Weaknesses CWE-79
CPEs cpe:2.3:a:typo3:html_sanitizer:*:*:*:*:*:*:*:*
Vendors & Products Typo3
Typo3 html Sanitizer
References
Metrics cvssV4_0

{'score': 5.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
TYPO3
Published
Updated
Jun 8, 2026, 7:49 PM
Reserved
May 19, 2026, 12:49 PM
Status
Deferred
Published
Jun 8, 2026, 8:17 PM
Modified
Jul 23, 2026, 8:10 AM