CVE-2026-47345 Details
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.
A vulnerability exists in TYPO3 HTML Sanitizer versions prior to 2.3.2, where namespace attributes are not properly encoded during HTML serialization. This flaw allows for bypassing the cross-site scripting (XSS) prevention mechanism of the sanitizer.
Users should update to TYPO3 HTML Sanitizer version 2.3.2 or later, where this vulnerability has been addressed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jun 8, 2026CISA-ADP
Assessed Jun 8, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/TYPO3/html-sanitizer/commit/8b5d0be44ded457ca993ec9ca93d859941c63764 | TYPO3 | Source CodeVendor |
| https://typo3.org/security/advisory/typo3-core-sa-2026-006 | TYPO3 | AdvisoryBroken LinkVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-79 | Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | TYPO3 |
Affected Products
| Product | Versions |
|---|---|
| TYPO3 html-sanitizer | < 2.3.2 (semver) |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 23, 2026 | CVE Translated | [email protected] |
| Jun 17, 2026 | CVE Modified | TYPO3 |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jun 8, 2026 | New CVE Received | TYPO3 |