CVE-2026-47344 Details
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.
A vulnerability in TYPO3 Html-Sanitizer prior to version 2.3.2 allows for a cross-site scripting (XSS) bypass. When the ALLOW_INSECURE_RAW_TEXT option is enabled, the sanitizer fails to recognize whitespace-variant closing tags, such as '</style >', as invalid. Browsers accept these tags as legitimate, which can lead to content escaping the intended sanitization. This flaw allows for the evasion of XSS prevention mechanisms within the affected version of the sanitizer.
Users can 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/bd1a88d9b5a5f67f1120ec41084e9c1a0675641c | TYPO3 | Source CodeVendor |
| https://typo3.org/security/advisory/typo3-core-sa-2026-006 | TYPO3 | AdvisoryBroken LinkVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-436 | Interpretation Conflict | TYPO3 |
| 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
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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 |